日本学術振興会 特別研究員(PD) 研究員

1997.4 - 1999.3

Society of Automotive Engineers, Inc.

自動車技術会   ガス燃料エンジン部門委員会 委員  

2020   

自動車技術会   持続可能な自動車社会検討部門委員会 幹事  

2020 - 2024.3   

自動車技術会   ディーゼル機関部門委員会 オブザーバ  

2020 - 2023.4   

日本機械学会   部門代議員  

2020 - 2022   

日本機械学会 エンジンシステム部門   広報委員会 委員長  

2019.4 - 2021.3   

日本機械学会 エンジンシステム部門   運営委員  

2019.4 - 2021.3   

日本マリンエンジニアリング学会   ディーゼル機関研究委員会 委員  

2019   

Atomization and Sprays   Associate (Lead) Editor/Editorial board member  

2019   

ILASS-Asia   Vice president  

2016.1 - 2020.12   

自動車技術会   計測・診断部門委員会 幹事  

2016 - 2019   

自動車技術会   代議員  

2012.4   

自動車技術会   関西支部 企画委員会 副委員長  

2010 - 2019   

日本液体微粒化学会   理事  

2007   

自動車技術会   関西支部 関西フォーミュラ委員会 主幹事  

2006   

自動車技術会   関西支部 理事  

2006   

Visualization of Combustion and Flow Phenomena in a Methane-Fueled Passive Pre-Chamber Ignited Gas Engine Reviewed

MD Tanvir KHAN, Nobuyuki Kawahara, Yoshimitsu Kobashi, Towa Hirayama, Ayumi Shimizu, Sekai Miyamoto

2023 JSAE/SAE Powertrains, Energy and Lubricants Int. Meeting, JSAE 20239119, SAE 2023-32-0057   2023.8

PREMIER Combustion of Natural Gas Ignited with Diesel Fuel in a Dual Fuel Engine - Effects of EGR and Supercharging on End-gas Auto Ignition and Thermal Efficiency- Reviewed

Yoshimitsu Kobashi, Kengo Kishimoto, Nobuyuki Kawahara

2023 JSAE/SAE Powertrains, Energy and Lubricants Int. Meeting, JSAE 20239121, SAE 2023-32-0016   2023.8

Spatially and temporally resolved plasma formation on alumina target in microwave-enhanced laser-induced breakdown spectroscopy Reviewed

Yuji Ikeda, Joey Kim Soriano, Nobuyuki Kawahara, Ikuo Wakaida

Spectrochimica Acta Part B: Atomic Spectroscopy   197   106533 - 106533   2022.11

Evaluation of ignition characteristics of diesel spray using large eddy simulation Reviewed

Nobuyuki Kawahara

22nd Annual Conference on Liquid Atomization and Spray Systems-ILASS-Asia 2022, Paper No. 40   2022.10

Plasma formation and its sustainment in time and space in microwave enhanced laser induced breakdown spectroscopy Reviewed

Yuji Ikeda, Joey Kim Soriano, Nobuyuki Kawahara

20th Int. Symp. on the Application of Laser and Imaging Techniques on Fluid Mechanics (LISBON)   2022.7

Spark-induced breakdown spectroscopy in a direct-injected natural gas spark-ignition engine Reviewed

Nobuyuki Kawahara, Kohei Miyao

20th Int. Symp. on the Application of Laser and Imaging Techniques on Fluid Mechanics (LISBON)   2022.7

Visualization of End-gas Auto-ignition during PREMIER Combustion in a Dual-fuel Gas Engine Reviewed

Nobuyuki Kawahara, Eiji Tomita

The 10th International Conference on Modeling and Diagnostics for Advanced Engine Systems (COMODIA 2022), C9-3   2022.7

Measurement of Cyclic Variation of the Air-to-Fuel Ratio of Exhaust Gas in an SI Engine by Laser-Induced Breakdown Spectroscopy Reviewed

Yuji Ikeda, Nobuyuki Kawahara

Energies   15 ( 9 )   3053 - 3053   2022.4

PREMIER combustion characteristics of a pilot fuel-ignited dual-fuel biogas engine with consideration of cycle-to-cycle variations Reviewed

Taku Imamoto, Nobuyuki Kawahara, Eiji Tomita

Fuel   314   123049 - 123049   2022.4

Fuel spray impingement and liquid film formation in a gasoline direct-injection spark-ignition engine Reviewed

Y. Tomomatsu, N. Kawahara, E. Tomita

International Journal of Environmental Science and Technology   20 ( 1 )   477 - 488   2022.3

Droplet diameter measurement near a nozzle exit of a common-rail Diesel injector using PDA Reviewed International journal

Nobuyuki Kawahara, Rikuya Yamada, Eiji Tomita

15th International Conference on Liquid Atomization and Spray Systems, ICLASS2021, Paper No. 247   2021.8

Differences between PREMIER combustion in a dual-fuel gas engine and knocking with pressure oscillations Invited

Nobuyuki Kawahara

7th International Seminar on Motor Vehicle Environmental Protection   2021.7

Performance, emissions and end-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine with various CO2 ratios Reviewed International journal

Alireza Valipour Berenjestanaki, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

Fuel   286   119330 - 119330   2021.2

Multidimensional CFD Simulation of PAH Formation Process in Diesel Spray Combustion Reviewed

Nobuyuki Kawahara, Hirotomo Daido, Eiji Tomita

21st Annual Conference on Liquid Atomization and Spray Systems-ILASS-Asia 2020, ILASS-Asia2020-3-12   2020.10

Quantitative evaluation of liquid film formation process from DISI injector using LIF method Reviewed

Yasutaka Tomomatsu, Nobuyuki Kawahara, Eiji Tomita

21st Annual Conference on Liquid Atomization and Spray Systems-ILASS-Asia 2020, ILASS-Asia2020-3-11   2020.10

Binary collisions and coalescence of droplets in low-pressure fuel injector Reviewed International coauthorship International journal

Fatma Ahmed, Nobuyuki Kawahara, Eiji Tomita

Thermal Science   ( 00 )   185 - 185   2020

CO2 Concentration Measurements inside Expansion-Compression Engine Under High EGR Conditions using an Infrared Absorption Method Reviewed International coauthorship International journal

Fatma B, M. Ahmed, Mohamed F. C. Esmail, Nobuyuki Kawahara, Eiji Tomita

Ain Shams Engineering Journal   11 ( 3 )   787 - 793   2020

Attainment of High Thermal Efficiency and Near-zero Emissions by Optimizing Injected Spray Configuration in Direct Injection Hydrogen Engines Reviewed

Masakuni Oikawa, Yasuo Takagi, Yuji Mihara, Nobuyuki Kawahara, Eiji Tomita, Ken Naitoh

SAE Technical Papers   ( December )   2019.12

Plasma Temperature of Spark Discharge in a Lean-burn Spark-ignition Engine Using a Time Series of Spectra Measurements Reviewed

Nobuyuki Kawahara, Masanobu Watanabe, Eiji Tomita, Yukihide Nagano, Toshiaki Kitagawa

SAE Technical Papers   ( December )   2019.12

Droplet diameter distribution measurement of a gasoline DISI injector using PDA Reviewed

Nobuyuki Kawahara, Bunta Mori, Eiji Tomita

20th Annual Conference on Liquid Atomization and Spray Systems-ILASS-Asia 2019, ILASS-Asia2019-064   2019.12

End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine Reviewed International journal

Alireza Valipour Berenjestanaki, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

Fuel   254   115634 - 115634   2019.10

3D CFD of Auto-ignition at the End Gas Region in Dual-fuel Gas Engine Reviewed

Nobuyuki Kawahara, Eiji Tomita

12th Asia-Pacific Conference on Combustion-ASPACC2019, 2019-1211   2019.7

Evaluation of Combustion Characteristics of Ultra Low Sulphur Fuel Oil by Using OCA (Optical Combustion Analyzer) and Performance and Exhaust Emissions in a Two Stroke Diesel Engine Reviewed

Eiji Tomita, Yuya Kubota, Nobuyuki Kawahara, Kazuya Tsuboi, Ken Miyauchi, Morio Kondo

29th CIMAC World Congress, 2016-181   2019.6

Differences between PREMIER combustion in a natural gas spark-ignition engine and knocking with pressure oscillations Reviewed International journal

Kawahara Nobuyuki, Kim Yungjin, Wadahama Hisashi, Tsuboi Kazuya, Tomita Eiji

PROCEEDINGS OF THE COMBUSTION INSTITUTE   37 ( 4 )   4983 - 4991   2019

Experimental and Numerical Analysis of Laser-ignition of Wet Ethanol with Elevated Water Content Reviewed International coauthorship

Kazi Mostafijur Rahman, Nobuyuki Kawahara, Eiji Tomita

International Journal of Automotive Engineering and Technologies   8 ( 2 )   61 - 69   2019

Advanced Combustion in Natural Gas-Fueled Engines

Ulugbek Azimov, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

Energy, Environment, and Sustainability   215 - 250   2019

後方散乱X線を用いた層流予混合火炎の温度分布と化学状態の計測 Reviewed

櫻井浩, 河原伸幸, 冨田栄二, 鈴木宏輔, 伊藤真義, 櫻井吉晴

日本エネルギー学会機関紙えねるみくす   97 ( 4 )   2018.4

Numerical Investigation of Natural Gas-Diesel Dual Fuel Engine with End Gas Ignition Reviewed

Apoorv Talekar, Ming Chia Lai, Eiji Tomita, Nobuyuki Kawahara, Ke Zeng, Bo Yang

SAE Technical Papers   2018-April   2018.1

Characterisation of DME-HCCI combustion cycles for formaldehyde and hydroxyl UV-vis absorption Reviewed International coauthorship International journal

Ulugbek Azimov, Nearchos Stylianidis, Nobuyuki Kawahara, Eiji Tomita

FUEL   210   578 - 591   2017.12

Improvement of thermal efficiency and reduction of NOx emissions by burning a controlled jet plume in high-pressure direct-injection hydrogen engines Reviewed International journal

Yasuo Takagi, Hiroki Mori, Yuji Mihara, Nobuyuki Kawahara, Eiji Tomita

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   42 ( 41 )   26114 - 26122   2017.10

Chemical kinetics and CFD analysis of supercharged micro-pilot ignited dual-fuel engine combustion of syngas Reviewed International coauthorship International journal

Nearchos Stylianidis, Ulugbek Azimov, Alireza Maheri, Eiji Tomita, Nobuyuki Kawahara

FUEL   203   591 - 606   2017.9

High-speed visualization of fuel spray impingement in the near-wall region using a DISI injector Reviewed

N. Kawahara, K. Kintaka, E. Tomita

SELECTED PAPERS FROM THE 31ST INTERNATIONAL CONGRESS ON HIGH-SPEED IMAGING AND PHOTONICS   10328   2017

Spark discharge ignition process in a spark-ignition engine using a time series of spectra measurements Reviewed International coauthorship International journal

Nobuyuki Kawahara, Shota Hashimoto, Eiji Tomita

PROCEEDINGS OF THE COMBUSTION INSTITUTE   36 ( 3 )   3451 - 3458   2017

Extension of PREMIER combustion operation range using split micro pilot fuel injection in a dual fuel natural gas compression ignition engine: A performance-based and visual investigation Reviewed

Cagdas Aksu, Nobuyuki Kawahara, Kazuya Tsuboi, Morio Kondo, Eiji Tomita

FUEL   185   243 - 253   2016.12

Combustion characteristics and NOx emissions of biogas fuels with various CO2 contents in a micro co-generation spark-ignition engine Reviewed

Yungjin Kim, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

APPLIED ENERGY   182   539 - 547   2016.11

Quantum cascade laser assisted time-resolved measurements of carbon dioxide absorption during combustion in DME-HCCI engine Reviewed

Ulugbek Azimov, Nobuyuki Kawahara, Eiji Tomita

FUEL   182   807 - 815   2016.10

Local fuel concentration measurement through spark-induced breakdown spectroscopy in a direct-injection hydrogen spark-ignition engine Reviewed

Kazi Mostafijur Rahman, Nobuyuki Kawahara, Daichi Matsunaga, Eiji Tomita, Yasuo Takagi, Yuji Mihara

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   41 ( 32 )   14283 - 14292   2016.8

Densitometry and temperature measurement of combustion gas by X-ray Compton scattering Reviewed

Hiroshi Sakurai, Nobuyuki Kawahara, Masayoshi Itou, Eiji Tomita, Kosuke Suzuki, Yoshiharu Sakurai

JOURNAL OF SYNCHROTRON RADIATION   23 ( 2 )   617 - 621   2016.3

Combustion characteristics of wet ethanol ignited using a focused Q-switched Nd:YAG nanosecond laser Reviewed

Kazi Mostafijur Rahman, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

FUEL   165   331 - 340   2016.2

Effect of ambient pressure on local concentration measurement of transient hydrogen jet in a constant-volume vessel using spark-induced breakdown spectroscopy Reviewed

Md Tasyrif Abdul Rahman, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   40 ( 13 )   4717 - 4725   2015.4

Visualization and concentration measurement of a direct-injection hydrogen jet in a constant-volume vessel using spark-induced breakdown spectroscopy Reviewed

Md Tasyrif Abdul Rahman, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   39 ( 31 )   17896 - 17905   2014.10

Laser-induced plasma generation and evolution in a transient spray Reviewed

Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

OPTICS EXPRESS   22 ( 1 )   A44 - A52   2014.1

Combustion and Emission Characteristics of a Premixed Charge Compression Ignition Engine Reviewed

Robert Kiplimo, Eiji Tomata, Nobuyuki Kawahara, Sumito Yokobe

Journal of Sustainable Research in Engineering   1 ( 1 )   8 - 16   2014

Jet-guided combustion characteristics and local fuel concentration measurements in a hydrogen direct-injection spark-ignition engine Reviewed

Mithun Kanti Roy, Nobuyuki Kawahara, Eiji Tomita, Takashi Fujitani

PROCEEDINGS OF THE COMBUSTION INSTITUTE   34   2977 - 2984   2013

UV-visible light absorption by hydroxyl and formaldehyde and knocking combustion in a DME-HCCI engine Reviewed

Ulugbek Azimov, Nobuyuki Kawahara, Eiji Tomita

FUEL   98   164 - 175   2012.8

Effects of spray impingement, injection parameters, and EGR on the combustion and emission characteristics of a PCCI diesel engine Reviewed

Robert Kiplimo, Eiji Tomita, Nobuyuki Kawahara, Sumito Yokobe

APPLIED THERMAL ENGINEERING   37   165 - 175   2012.5

Premixed mixture ignition in the end-gas region (PREMIER) combustion in a natural gas dual-fuel engine: operating range and exhaust emissions Reviewed

U. Azimov, E. Tomita, N. Kawahara, Y. Harada

INTERNATIONAL JOURNAL OF ENGINE RESEARCH   12 ( 5 )   484 - 497   2011.10

Multidimensional CFD simulation of syngas combustion in a micro-pilot-ignited dual-fuel engine using a constructed chemical kinetics mechanism Reviewed

Ulugbek Azimov, Masahiro Okuno, Kazuya Tsuboi, Nobuyuki Kawahara, Eiji Tomita

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   36 ( 21 )   13793 - 13807   2011.10

Effect of syngas composition on combustion and exhaust emission characteristics in a pilot-ignited dual-fuel engine operated in PREMIER combustion mode Reviewed

Ulugbek Azimov, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   36 ( 18 )   11985 - 11996   2011.9

Comparison of performance and emissions of a supercharged dual-fuel engine fueled by hydrogen and hydrogen-containing gaseous fuels Reviewed

Murari Mohon Roy, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada, Atsushi Sakane

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   36 ( 12 )   7339 - 7352   2011.6

Cycle-resolved residual gas concentration measurement inside a heavy-duty diesel engine using infrared laser absorption Reviewed

Nobuyuki Kawahara, Eiji Tomita, Atsushi Ohtsuki, Yuzo Aoyagi

PROCEEDINGS OF THE COMBUSTION INSTITUTE   33   2903 - 2910   2011

Effects of Compression Ratio and Simulated EGR on Combustion Characteristics and Exhaust Emissions of a Diesel PCCI Engine Reviewed

Robert Kiplimo, Eiji Tomita, Nobuyuki Kawahara, Sumito Yokobe

JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY   6 ( 3 )   463 - 474   2011

In situ fuel concentration measurement near a spark plug in a spray-guided direct-injection spark-ignition engine using infrared absorption method Reviewed

Nobuyuki Kawahara, Eiji Tomita, Takuya Kadowaki, Tetsuya Honda, Hideaki Katashiba

EXPERIMENTS IN FLUIDS   49 ( 4 )   925 - 936   2010.10

Direct microscopic image and measurement of the atomization process of a port fuel injector Reviewed

Mohamed Esmail, Nobuyuki Kawahara, Eiji Tomita, Mamoru Sumida

MEASUREMENT SCIENCE AND TECHNOLOGY   21 ( 7 )   2010.7

An experimental investigation on engine performance and emissions of a supercharged H-2-diesel dual-fuel engine Reviewed

Murari Mohon Roy, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada, Atsushi Sakane

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   35 ( 2 )   844 - 853   2010.1

Evaluation of the Flame Lift-off Length in Diesel Spray Combustion Based on Flame Extinction Reviewed

Ulugbek Azimov, Nobuyuki Kawahara, Eiji Tomita, Kazuya Tsuboi

JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY   5 ( 2 )   238 - 251   2010

Characterization of the Spray of the DISI Multi-hole Injector by Means of Phase Doppler Anemometer(共著） Reviewed

Fatma AHMED, Nobuyuki KAWAHARA, Eiji TOMITA, Mamoru SUMIDA

Journal of Thermal Science and Technology   35 ( 2 )   844 - 853   2010

Characterization of the Spray of the DISI Multi-hole Injector by Means of Phase Doppler Anemometer Reviewed

Fatma Ahmed, Nobuyuki Kawahara, Eiji Tomita, Mamoru Sumida

JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY   5 ( 1 )   36 - 50   2010

Performance and emissions of a supercharged dual-fuel engine fueled by hydrogen-rich coke oven gas Reviewed

Murari Mohon Roy, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada, Atsushi Sakane

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   34 ( 23 )   9628 - 9638   2009.12

Fuel concentration measurement of premixed mixture using spark-induced breakdown spectroscopy Reviewed

N. Kawahara, E. Tomita, S. Takemoto, Y. Ikeda

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY   64 ( 10 )   1085 - 1092   2009.10

Performance and emission comparison of a supercharged dual-fuel engine fueled by producer gases with varying hydrogen content Reviewed

Murari Mohon Roy, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada, Atsushi Sakane

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   34 ( 18 )   7811 - 7822   2009.9

Visualization of auto-ignition and pressure wave during knocking in a hydrogen spark-ignition engine Reviewed

Nobuyuki Kawahara, Eiji Tomita

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   34 ( 7 )   3156 - 3163   2009.4

Laser-induced radical generation and evolution to a self-sustaining flame Reviewed

J. L. Beduneau, N. Kawahara, T. Nakayama, E. Tomita, Y. Ikeda

COMBUSTION AND FLAME   156 ( 3 )   642 - 656   2009.3

High temporally resolved optical measurement for laser ignition process of laminar premixed mixtures Reviewed

Takashi Nakayama, Nobuyuki Kawahara, Eiji Tomita, Yuji Ikeda

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   74 ( 743 )   1633 - 1640   2008.7

Spatially, temporally, and spectrally resolved measurement of laser-induced plasma in air Reviewed

N. Kawahara, J. L. Beduneau, T. Nakayama, E. Tomita, Y. Ikeda

APPLIED PHYSICS B-LASERS AND OPTICS   86 ( 4 )   605 - 614   2007.3

Auto-ignited kernels during knocking combustion in a spark-ignition engine Reviewed

Nobuyuki Kawahara, Eiji Tomita, Yoshitomo Sakata

PROCEEDINGS OF THE COMBUSTION INSTITUTE   31 ( 2 )   2999 - 3006   2007

Cycle-resolved measurements of the fuel concentration near a spark plug in a rotary engine using an in situ laser absorption method Reviewed

Nobuyuki Kawahara, Eiji Tomita, Kenta Hayashi, Michihiko Tabata, Kouhei Iwai, Ryoji Kagawa

PROCEEDINGS OF THE COMBUSTION INSTITUTE   31 ( 2 )   3033 - 3040   2007

軽油着火過給天然ガスエンジンにおける燃焼および排気特性 Reviewed

深谷信彦, 冨田栄二, 河原伸幸, 丸山慶士, 薦田哲男

自動車技術会論文集   38 ( 2 )   125 - 130   2007

Combustion and Exhaust Emissions Characteristics in the Supercharged Engine Ignited with Gas Oil Fueled by Pyrolysis Gas Generated from Biomass Reviewed

FUKATANI Nobuhiko, TOMITA Eiji, KAWAHARA Nobuyuki, MARUYAMA Keiji, KOMODA Tetsuo

Transactions of the Japan Society of Mechanical Engineers B   73 ( 730 )   1337 - 1344   2007

Method for Predicting Scuffing on Poston Ring and Cylinder Liner in Marine Diesel Engines: Damage Prevention Using Observation of Combustion Flame:Damage Prevention Using Observation of Combustion Flame Reviewed

Takasu Isao, Kan Tadayuki, Takasaki Koji, Tomita Eiji, Kawahara Nobuyuki

JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN   39 ( 4 )   250 - 258   2004

1.4.3 燃焼過程の光計測技術，革新的燃焼技術による高効率内燃機関開発最前線

エヌティーエス  2015 

Developments in Laser Techniques and Fluid Mechanics

2001 

エンジン筒内の燃料濃度計測技術

河原　伸幸

計測と制御   57   328 - 332   2018.5

新しい計測診断技術（エンジン計測技術）

河原　伸幸

Engine Review   8 ( 3 )   17 - 19   2018.5

光学的燃焼可視化装置(OCA)による極低硫黄燃料油の着火性および燃焼性の評価

窪田裕也, 冨田栄二, 河原伸幸, 坪井和也, 宮地健, 近藤守男

マリンエンジニアリング学術講演会講演論文集   88th   2018

Visualization of combustion processes of internal combustion engines

Nobuyuki Kawahara

The Micro-World Observed by Ultra High-Speed Cameras: We See What You Don't See   261 - 275   2017.8

Multidimensional CFD simulation of diesel spray combustion using chemical kinetics

Nobuyuki Kawahara, Norihiro Takeda, Eiji Tomita

COMODIA 2017 - 9th International Conference on Modeling and Diagnostics for Advanved Engine Systems   2017.1

Chemical Kinetics and Computational Fluid-Dynamics Analysis of H2/CO/CO2/CH4 Syngas Combustion and NOx Formation in a Micro-Pilot-Ignited Supercharged Dual Fuel Engine

Nearchos Stylianidis, Ulugbek Azimov, Nobuyuki Kawahara, Eiji Tomita

SAE Technical Papers   2017-   394 - 404   2017

第27回内燃機関シンポジウム（点火）

自動車技術会，Engine Review   7 ( 6 )   17 - 18   2017

新しい計測診断技術Ⅲ（新しい流れ計測技術）

自動車技術会，Engine Review   7 ( 1 )   14 - 15   2017

Evaluation of Nozzle Exit Model for Transient Spray in a Multi -Hole DISI Injector

Nobuyuki Kawahara, Shuhei Takada, Eiji Tomita

19th Annual Conference of ILASS-Asia   2017

Fuel Spray Impingement Behaviors for DISI engine : Effect of Surface Roughness on Critical Weber Number

25   177 - 183   2016.12

Numerical simulation of diesel spray combustion considering initial condition

25   206 - 212   2016.12

Fuel Spray Impingement Behaviors for DISI Engine : Verification of Fuel Spray Impingement and Nozzle Exit Model with Numerical Simulation

25   171 - 176   2016.12

Optimization of Fuel Jet Geometry, Injection Timing and Ignition Timing Focusing on Improving Thermal Efficiency in Direct Injection Hydrogen Engines

47 ( 3 )   705 - 710   2016.5

Construction of the nozzle exit model on a DISI injector

24   103 - 108   2015.12

Effect of Bio-Gas Contents on SI Combustion for a Co-Generation Engine

Yungjin Kim, Nobuyuki Kawahara, Eiji Tomita, Hiroshi Oshibe, Koichi Nishikawa

SAE Technical Papers   2015- ( September )   2015.9

Effect of Hydrogen Concentration on Engine Performance, Exhaust Emissions and Operation Range of PREMIER Combustion in a Dual Fuel Gas Engine Using Methane-Hydrogen Mixtures

Cagdas Aksu, Nobuyuki Kawahara, Kazuya Tsuboi, Shun Nanba, Eiji Tomita, Morio Kondo

SAE Technical Papers   2015- ( September )   2015.9

1003 Measurement of transience gas temperature with laser interferometry

Nishimura Tomotaka, Tomita Eiji, Kawahara Nobuyuki

2015 ( 53 )   "1003 - 1"-"1003-2"   2015.2

Experimental study on combustion characteristics of wet ethanol ignited by Laser-induced breakdown

Kazi Mostafijur Rahman, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

Laser Ignition Conference, LIC 2015   2015.1

Visualization of fuel impingement on the piston top in a DISI engine

Proc. of 13th International Conference on Liquid Atomization and Spray Systems (ICLASS ) (Tainan, Taiwan)   B1-1-041   2015

Spark-Discharge Behavior in Gasoline Spark-Ignition Engine

57 ( 180 )   106 - 111   2015

Combustion Diagnostics Using Time-Series Analysis of Radical Emissions in a Practical Engine

21st Small Engine Technology Conference (SETC) (Osaka, Japan)   2015-32-0748   2015

Effects of Bio-gas Contents on SI Combustion for a Co-generation Engine

SAE 2015 Powertrains, Fuels and Lubricants Meeting (Kyoto Japan)   JSAE No.20159094/SAE 2015-01-1946   2015

Simultaneous measurement of droplet diameter and velocity near the nozzle exit of a direct-injection spark-ignition engine injector

23   179 - 184   2014.12

Time-series Spectra Measurements from Initial Flame Kernel in a Spark-Ignition Engine

Nobuyuki Kawahara, Atsushi Inoue, Eiji Tomita

17th International Symposium on Applications of Laser Techniques to Fluid Mechanics   1 - 7   2014

Laser Ignition Characteristics of Hydrous Ethanol

Kazi Mostafijur Rahman, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

The 2nd Laser Ignition Conference   1 - 4   2014

レーザー誘起ブレークダウン分光法のエンジン研究への適用

河原伸幸, 冨田栄二

レーザー研究   42 ( 12 )   897 - 902   2014

Atomization Characteristics of Transient Spray near the Nozzle Exit of DISI Injector

22   393 - 398   2013.12

F071002 Simultaneous Measurements of Fuel/CO_2 Concentration around a Spark Plug

KAWAHARA Nobuyuki

Mechanical Engineering Congress, Japan   2013   "F071002 - 1"-"F071002-5"   2013.9

1406 Pressure and Temperature dependence of water vapor molar absorption coefficient using diode laser

KAWAHARA Nobuyuki, TOMITA Eiji, IEMURA Naruaki

2013 ( 51 )   "1406 - 1"-"1406-2"   2013.2

Mixing process of direct injection hydrogen jet in a constant volume vessel by using spark-induced breakdown spectroscopy

Md Tasyrif Bin Abdul Rahman, Nobuyuki Kawahara, Eiji Tomita

SAE Technical Papers   11   2013

In-cylinder observations of chemiluminescence in turbulent premixed flames using a spark plug sensor with an optical fiber

Nobuyuki Kawahara, Atsushi Inoue, Eiji Tomita

SAE Technical Papers   11   2013

軽油着火式二元燃料ガスエンジンにおける筒内燃焼の数値解析-Syngas化学反応機構のバイオガス燃焼への適用-

河副瑠惟, 河原伸幸, 冨田栄二, 坪井和也, 脇坂知行, 近藤守男

内燃機関シンポジウム講演論文集(CD-ROM)   24th   2013

Laser Ignition Characteristics of Ethanol Spray

KAWAHARA Nobuyuki, TOMITA Eiji, TANIGUCHI Yosuke

21   205 - 210   2012.12

Spectrum analysis of chemiluminescence of a low sooting PCCI diesel engine operating with moderately early injection timing

Robert Kiplimo, Eiji Tomita, Nobuyuki Kawahara, Sumito Yokobe

Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012   410 - 415   2012.12

E134 Development of Measurement System for Unsteady Gas Temperature with Laser Interferometry

Ninomiya Jin, Tomita Eiji, Kawahara Nobuyuki

Procee[d]ings of Thermal Engineering Conference   2012   155 - 156   2012.11

1416 Water Vapor Concentration Measurements Using Diode Laser Absorption Method :Pressure and Temperature Dependence on Water Vapor Absorption Spectra

KAWAHARA Nobuyuki, TOMITA Eiji, GUO Wenxiao

2012 ( 50 )   141601 - 141602   2012.2

1410 Effect of intake port configuration on gas flow in an engine cylinder

KAWAHARA Nobuyuki, TOMITA Eiji, Shiyu ZHOU

2012 ( 50 )   141001 - 141002   2012.2

Combustion and Emission Characteristics of a Low Emission and Highly Efficient PCCI Diesel Engine

Robert Kiplimo, Eiji Tomita, Nobuyuki Kawahara, Sumito Yokobe, Mitsui Engineering, Shipbuilding, Co

Sustainable Research and Innovation Conference 2012 at JKUAT   1 - 7   2012

高速度カメラを用いた噴霧現象の可視化

河原伸幸

微粒化   2012

Simultaneous Measurement of Evaporating Droplet Diameter Using Phase Doppler Anemometry and High-speed Camera

Nobuyuki Kawahara, Eiji Tomita, Hiroya Okano

12th International Conference on Liquid Atomization and Spray Systems (ICLASS2012)   1 - 8   2012

Low Sooting Combustion in a PCCI Diesel Engine with Moderately Early Injection Timing

Robert Kiplimo, Eiji Tomita, Nobuyuki Kawahara, Sumito Yokobe, Mitsui Engineering, Shipbuilding, Co

The 8th KSME-JSME Thermal and Fluids Engineering Conference (Incheon, Korea)   FR02-001   1 - 4   2012

Effect of Equivalence Ratio on Combustion Characteristics in a Hydrogen Direct-Injection SI Engine

Mithun Kanti Roy, Nobuyuki Kawahara, Eiji Tomita, Takashi Fujitani

4th International Conference on Sustainable Automotive Technologies (ICSAT2012)   1 - 8   2012

High-Pressure Hydrogen Jet and Combustion Characteristics in a Direct-Injection Hydrogen Engine

Roy, M, Kawahara, N, Tomita, E, Fujitani, T

SAE International Journal of Fuels and Lubricants   5 ( 3 )   1414 - 1425   2012

Effect of Spark Timing on Combustion Characteristics in a Direct-Injection Hydrogen Engine

Nobuyuki Kawahara, Mithun Kanti Roy, Takashi Fujitani, Eiji Tomita

The 8th KSME-JSME Thermal and Fluids Engineering Conference (Incheon, Korea)   FR02-001   1 - 2   2012

予混合圧縮自着火機関筒内現象の数値解析(燃料噴射時期が燃焼に与える影響)

河原伸幸, 冨田栄二, 坪井和也, 高橋育子, 脇坂知行, 近藤守男

日本機械学会・自動車技術会内燃機関シンポジウム講演論文集   23rd   2012

Measurement of droplet diameter injected from a port fuel injector spray by using high-speed visualization

KAWAHARA Nobuyuki, TOMITA Eiji, UENO Kohei, SUMIDA Mamoru

20   50 - 55   2011.12

Visualization of Combustion Flame inside Engine

KAWAHARA Nobuyuki

Journal of the Japan Society of Mechanical Engineers   114 ( 1114 )   676 - 677   2011.9

Ignition Characteristics in Transient Spray by Laser-Induced Plasma

KAWAHARA Nobuyuki, TOMITA Eiji, NAKAMURA Shinya

20 ( 70 )   61 - 67   2011.7

High-pressure hydrogen jet and combustion characteristics in a direct-injection hydrogen engine

Mithun Kanti Roy, Nobuyuki Kawahara, Eiji Tomita, Takashi Fujitani

SAE Technical Papers   2011

Effects of injection pressure, timing and EGR on combustion and emissions characteristics of diesel PCCI engine

Robert Kiplimo, Eiji Tomita, Nobuyuki Kawahara, Shiyu Zhou, Sumito Yokobe

SAE Technical Papers   2011

Ignition, combustion and exhaust emission characteristics of micro-pilot ignited dual-fuel engine operated under PREMIER combustion mode

Ulugbek Azimov, Eiji Tomita, Nobuyuki Kawahara

SAE Technical Papers   2011

バイオガスを用いた二元燃料ガスエンジン筒内燃焼の数値解析

田中雅高, 冨田栄二, 河原伸幸, 坪井和也, 脇坂知行

燃焼シンポジウム講演論文集   49th   2011

Ignition Characteristics in Unsteady Spray by Laser-Induced Plasma

NAKAMURA Shinya, KAWAHARA Nobuyuki, TOMITA Eiji

19   140 - 145   2010.12

Measurement of Non-spherical Droplets Configuration for Gasoline Spray with Dual PDA

OKANO Hiroya, KAWAHARA Nobuyuki, TOMITA Eiji

19   77 - 82   2010.12

Visualization of Auto-Ignition of End Gas Region without Knock in a Spark-Ignition Natural Gas Engine(共著）

Eiji Tomita, Nobuyuki Kawahara, Jianjun Zheng

Journal of KONES Powertrain and Transport   17 ( 4 )   521 - 527   2010

点火プラグ組込型センサによる燃料濃度計測(共著）

河原伸幸, 冨田栄二

日本燃焼学会誌   52 ( 159 )   17 - 25   2010

点火プラグ実装型燃料・残留ガス濃度計測システム(共著）

河原伸幸, 冨田栄二

自動車技術   64 ( 2 )   56 - 61   2010

Effect of component of biomass-based gaseous fuels on combustion in a super-charged gas engine with micro-pilot injection(共著）

Eiji Tomita, Nobuyuki Kawahara, Murari Mohon Roy

Proceedings of Thirty-Second Task Leaders Meeting   138 - 144   2010

Fuel Concentration Measurement of Premixed Mixture in a Spark-Ignition Engine Using Spark-Induced Breakdown Spectroscopy(共著）

Kawahara, N, Tomita, E, Oka, T, Ikeda, Y

15th Int. Symp. on Application of Laser Techniques on Fluid Mechanics   2.11.3   2010

Residual Gas Concentration Measurement inside a Spark-ignition Engine Using Infrared Laser Absorption Method(共著）

Kawahara, N, Tomita, E, Ohtsuki, A

15th Int. Symp. on Application of Laser Techniques on Fluid Mechanics   2.8.3   2010

Knock Characteristics and Combustion Spectroscopy in a Small Natural Gas Engine Ignited with a Pilot Injection of Gas Oil(共著）

Eiji Tomita, Nobuyuki Kawahara, Atsushi Sakane

Second International Conference of Energy Engineering (ICEE-2)   31   2010

Visualization of Knocking Combustion in a Hydrogen Spark-Ignition Engine(共著）

Mithun Kanti Roy, Nobuyuki Kawahara, Eiji Tomita

18th World Hydrogen Energy Conference 2010 - WHEC2010   78 ( 6 )   141 - 148   2010

PDA measurement near the nozzle exit of a DISI injector

KAWAHARA Nobuyuki, TOMITA Eiji, SHIBATA Yuuichi, SUMIDA Mamoru

18   215 - 220   2009.12

Simultaneous Measurements of Droplet Diameter and Velocity Using Phase Doppler Anemometer

KAWAHARA Nobuyuki, TOMITA Eiji

18 ( 63 )   96 - 102   2009.9

F208 Study of a Supercharged Dual-Fuel Engine Fueled by Producer Gases with Varying Injection Parameters and Hydrogen Content

Roy Murari Mohon, Tomita Eiji, Kawahara Nobuyuki, Harada Yuji, Sakane Atsushi

National Symposium on Power and Energy Systems   2009 ( 14 )   487 - 488   2009.6

412 Gasoline Spray Characteristics and Its Measurement Techniques

KAWAHARA Nobuyuki

2009 ( 84 )   "4 - 11"   2009.3

413 Measurement of Fluid Temperature with Laser Interferometer

TOMITA Eiji, KAWAHARA Nobuyuki, YAMAGATA Toshihiro

2009 ( 47 )   119 - 120   2009.2

808 Air-Fuel Ratio Measurement on Engine Using Laser Induced Breakdown Spectroscopy

2009 ( 47 )   271 - 272   2009.2

赤外吸収法によるエンジンシリンダ内ガス濃度計測

河原伸幸, 冨田栄二

日本機械学会2009年度年次大会講演資料集   2009   181 - 182   2009

PDA analysis near nozzle region of Transient Spray from Multi-hole Injector of DISI engine

Fatma Ahmed, Nobuyuki Kawahara, Eiji Tomita, Mamoru Sumida

The 13th Annual Conference on Liquid Atomization and Spray Systems- Asia, pp.48-55.   2009

Microscopic Visualization of Transient Spray from Multi-hole Injector of DISI Engine

M. Esmail, N. Kawahara, E. Tomita, M.Sumida

ICLASS2009,Paper Number: 063   2009

Mixture formation process in a spark-ignition engine with ethanol blended gasoline

Nobuyuki Kawahara, Eiji Tomita, Takuya Kadowaki

SAE Technical Papers   2009

Effect of fuel injection parameters on engine performance and emissions of a supercharged producer gas-diesel dual fuel engine

Murari Mohon Roy, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada, Atsushi Sakane

SAE Technical Papers   2009

Effect of EGR on combustion and exhaust emissions in supercharged dual-fuel natural gas engine ignited with diesel fuel

Eiji Tomita, Yuji Harada, Nobuyuki Kawahara, Atsushi Sakane

SAE Technical Papers   2009

Visualization of Atomization Process in Practical Gasoline Injector : Liquid Ligament Break-up, Droplet Collision and Coalescence

KAWAHARA Nobuyuki, TOMITA Eiji, NAKAGOSHI Shinichi, SUMIDA Mamoru

Atomization   18 ( 62 )   61 - 67   2009

Effect of nozzle geometry on atomization of transient spray from port fuel injector

Mohamed Esmail, Nobuyuki Kawahara, Eiji Tomita, Mamoru Sumida

Proceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008   429 - 436   2008.12

Spray behavior near the nozzle of a DISI Multi-hole injector using phase doppler anemometer

Fatma Ahmed, Nobuyuki Kawahara, Eiji Tomita, Mamoru Sumida

Proceedings of the 7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008   445 - 452   2008.12

Fuel spray and its measurement techniques

Nobuyuki Kawahara, Eiji Tomita

Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy   87   897 - 902   2008.11

Knock characteristics and combustion spectroscopy in a small natural gas engine ignited with a pilot injection of gas oil

Mitsui Zosen technical review   ( 195 )   41 - 47   2008.10

軽油着火過給ガスエンジンにおけるバイオ燃料の燃焼・排気特性

冨田 栄二, 河原 伸幸, 薦田 哲男

日本機械学會誌 = Journal of the Japan Society of Mechanical Engineers   111 ( 1076 )   611 - 611   2008.7

816 Spectroscopic Diagnostics of Combustion in Supercharged Natural Gas Engine Ignited with Gas Oil

TOMITA Eiji, KAWAHARA Nobuyuki, HISAEDA Yusuke, KOMODA Tetsuo

2008 ( 46 )   309 - 310   2008.2

Application of Ultra High-speed Video Camera

KAWAHARA Nobuyuki, TOMITA Eiji

Journal of the Japan Society of Mechanical Engineers   111 ( 1071 )   120 - 123   2008.2

Visualization of Knocking Combustion in a Hydrogen Spark-Ignition Engine

Kawahara, N, Tomita, E, Yoshitomi, M

Meeting the Challenges to Sustainable Mobility   3 - 9   2008

Fuel Concentration Measurements of Premixed Mixture Using Spark-Induced Breakdown Spectroscopy

Kawahara, N, Ikeda, Y, Tomita, E, Takemoto, S

5th International Conference on Laser-Induced Breakdown Spectroscopy (LIBS2008)   22 - 26   2008

Effect of Gas Flow on Combustion and Exhaust Emissions in a Dual Fuel Natural Gas Engine

Tomita, E, Kawahara, N, Ohuchi, S, Komoda, T, Sakane, A

Journal of KONES Powertrain and Transport   15 ( 2 )   519 - 527   2008

Soot formation during knocking combustion in a spark-ignition engine

Kawahara, N, Tomita, E, Masatsuki, H

Int. Symp. on Combustion, Accepted Poster, Paper No. 1P79   2008

Knock in a Hydrogen Spark-Ignition Engine

Kawahara, N, Tomita, E, Yoshitomi, M

Int. Symp. on Combustion, Accepted Poster, Paper No. 1P74.   2008

Temperature Measurement of Water with a Sensor by Laser Interferometry Technique

Tomita, E, Kawahara, N

14th Int. Symp. on Application of Laser Techniques on Fluid Mechanics, Paper No. 6.3.4, in CD-rom   2008

Microscopic Visualization of Liquid Column Break-up Process in Gasoline PFI Injector

KAWAHARA N.

14th Int. Symp. on Application of Laser Techniques on Fluid Mechanics, 2008   2008

位相ドップラ法（PDA/PDPA）を用いた噴霧粒子径および速度の同時計測

河原伸幸, 冨田栄二

日本流体力学会誌「ながれ」   27 ( 4 )   303 - 310   2008

719 Observation of transient spray structure formed by a DISI injector

2007 ( 45 )   273 - 274   2007.3

721 Numerical Analysis of Laser Extinction on Laminar Premixed Flame

2007 ( 45 )   277 - 278   2007.3

718 Engine Exhaust Gas Measurements by Laser-Induced Breakdown Spectroscopy

2007 ( 45 )   271 - 272   2007.3

716 Measurement of Fuel Concentration in a Gas Engine Using a Laser-Induced Fluorescence Technique

TOMITA Eiji, KAWAHARA Nobuyuki, FUKATANI Nobuhiko, FUJIOKA Nobuyuki

2007 ( 45 )   267 - 268   2007.3

Measurement : Laser Fluorescence Method

KAWAHARA Nobuyuki

Atomization   15 ( 52 )   165 - 167   2007.1

Cycle-resolved measurements of the fuel concentration near a spark plug in an SI engine using an in-situ laser absorption method

N. Kawahara, E. Tomita, K. Hayashi

6th Asia-Pacific Conference on Combustion, ASPACC 2007   47 - 50   2007.1

Application of Laser Induced Breakdown Spectroscopy to Emission Gas Analysis of Spark Ignition Engine

Ikeda, Y, Nishiyama, A, Kaneko, M, Kawahara, N, Tomita, E

North American Symposium on Laser Induced Breakdown Spectroscopy   2007

Combustion in a Supercharged Biomass Gas Engine with Micro-pilot Ignition- Effect of Injection Pressure and Amount of Diesel Fuel -

Tomita, E, Fukatani, N, Kawahara, N, Maruyama, K, Komoda, T

Journal of KONES Powertrain and Transport   14 ( 2 )   513 - 520   2007

スワールインジェクタのノズル近傍における液膜分裂過程の可視化

河原伸幸, 冨田栄二, 住田守

微粒化   16 ( 54 )   24 - 33   2007

Gas temperature measurement in a DME-HCCI engine using heterodyne interferometry with spark-plug-in fiber-optic sensor

Changhee Lee, Nobuyuki Kawahara, Eiji Tomita, Kenji Inoshita

SAE Technical Papers   116 ( 4 )   316 - 324   2007

Residual gas fraction measurement inside engine cylinder using infrared absorption method with spark-plug sensor

Nobuyuki Kawahara, Eiji Tomita, Yutaka Tanaka

SAE Technical Papers   2007

In situ measurement of water temperature with a sensor using interferometry

Eiji Tomita

PROCEEDINGS OF THE ASME/JSME THERMAL ENGINEERING SUMMER HEAT TRANSFER CONFERENCE 2007, VOL 3   3   727 - 733   2007

Combustion Characteristics and Performance of Supercharged Pyrolysis Gas Engine with Micro-Pilot Ignition,

Tomita, E, Fukatani, N, Kawahara, N, Maruyama, K, Komoda, T

CIMAC 2007, Paper No.178.   2007

レーザ誘起ブレイクダウン分光法によるエンジン排気ガス計測

河原伸幸, 池田裕二, 冨田栄二

東北大学金研ワークショップ   2007

位相ドップラ法（PDA/PDPA）による噴霧粒径計測

河原伸幸, 松本雅則

第3回微粒化セミナー   45 - 58   2007

In-situ Residual Gas Concentration Measurement near a Spark Plug In a Motorcycle SI Engine

Kawahara, N, Tomita, E, Yasuda, H

Small Engine Technology Conference 2007, SAE Paper No. 2007-32-0049   2007

Fuel Break-up and Atomization Process near Nozzle Exit of Gasoline Injector

Kawahara, N

ILASS-Korea 2007, Invited Lecture.,   3 - 8   2007

赤外吸収法を利用した点火プラグ実装型センサによる燃焼濃度測定 (ロータリエンジンへの適用)

河原伸幸

第19回内燃機関シンポジウム講演論文集, 2007   2007

PFIインジェクタにおける液柱分裂過程の可視化

河原伸幸

第19回内燃機関シンポジウム講演論文集, 2007-1   2007

An aerosol nozzle that improves the spray agglomerative characteristics for optimal insecticide delivery to the target

Yuji Ikeda, Seung Mo Kim, Yoshihiro Horibe, Shigeki Takaki, Nobuyuki Kawahara

10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006   2006.12

PDA measurement of transient spray formed by a disi multi-hole injector

Nobuyuki Kawahara, Eiji Tomita, Hiroaki Nakasuji, Mamoru Sumida

10th International Conference on Liquid Atomization and Spray Systems, ICLASS 2006   2006.12

Spatial and temporal characteristics of laser-induced air plasma

Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama, Yuji Ikeda, Atsushi Nishiyama

Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting   23   17586 - 17595   2006.12

Local equivalence ratio measurement of CH<inf>4</inf>/air and C <inf>3</inf>H<inf>8</inf>/air laminar flames by laser-induced breakdown spectroscopy

Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Takashi Nakayama

Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting   16   11586 - 11598   2006.12

E213 Sensor for Fluid Temperature Measurement by Laser Interferometry : Water Temperature Measurement

TOMITA Eiji, KAWAHARA Nobuyuki, TODA Yasuji

Procee[d]ings of Thermal Engineering Conference   2006   349 - 350   2006.11

Performance in Supercharged Gas Engine Ignited with Gas Oil Fueled by Biomass Gas

FUKATANI Nobuhiko, TOMITA Eiji, KAWAHARA Nobuyuki, MARUYAMA Keiji, KOMODA Tetsuo

25   281 - 282   2006.6

512 Simultaneous Measurement of Droplet Diameter and Velocity in Transient Spray Using Planar Droplet Sizing Method

KAWAHARA Nobuyuki, TOMITA Eiji, MATSUMOTO Keigo

2006 ( 44 )   193 - 194   2006.2

Combustion Characteristics and Performance of Supercharged Micro-pilot Natural Gas Engine

FUKATANI N.

Proceedings of FISITA 2006 World Automotive Congress   2006

Local Equivalence Ratio Measurement of CH4/air and C3H8/air Laminar Flames with and without flame front by LIBS

Y. Ikeda, A. Nishiyama, N. Kawahara, T. Nakayama, E. Tomita

LIBS2006, Oral presentation   2006

Highly Spatially Resolved Measurements of Laser-induced Plasma in Laminar Premixed Methane-Air Flow

T. Nakayama, N. Kawahara, E. Tomita, Y. Ikeda, J.L. Beduneau

LIBS2006，poster   2006

Development of an aerosol nozzle to optimally deliver insecticides to the target and improve the agglomerative characteristics of the spray

Ikeda, Y, Kim, S.M, Horibe, Y, Takaki, S, Kawahara, N

ICLASS2006,   2006

火花点火機関におけるノッキング時の自着火部の可視化

河原伸幸, 冨田栄二

自動車技術会ガソリン機関部門シンポジウム，   No.17-06,pp.24-29.   2006

LIBS法を用いた層流予混合火炎における当量比計測

池田裕二, 西山 淳, 河原伸幸, 冨田栄二

日本分光学会レーザー誘起プラズマ分光部会・日本鉄鋼協会学会部門研究会”次世代鉄鋼迅速オンサイト分析の実用化”・合同講演会   2006

層流予混合ガスにおけるレーザ誘起プラズマの高空間・高時間分解光学計測

河原伸幸, 池田裕二, 中山崇, 冨田栄二

日本分光学会レーザー誘起プラズマ分光部会・日本鉄鋼協会学会部門研究会”次世代鉄鋼迅速オンサイト分析の実用化”・合同講演会   2006

518 Flame Anchor Point Structure Measurements of a Laminar Premixed Flame Using Local Chemiluminescence Spectra

KAWAHARA Nobuyuki, TOMITA Eiji, SHIMOKUBO Keitarou, IKEDA Yuji

2006 ( 44 )   205 - 206   2006

Spatially and Temporally Resolved Optical Measurement of Laser Ignition for Laminar CH4/Air Mixtures

Nakayama, T, Kawahara, N, Tomita, E, Ikeda, Y, Beduneau, J

31st International Symposium on Combustion,   2006

A New Sensor for Temperature Measurement of Water by Laser Interferometry Technique

Tomita, E, Kawahara, N, Toda, Y

13th Int. Symp. on Application of Laser Techniques on Fluid Mechanics,   2006

In-Situ Fuel Concentration Measurement Using an IR Spark Plug Sensor by Laser Infrared Absorption Method- Application to a Rotary Engine-

Kawahara,N, Tomita,E, Hayashi, K, Tabata, M, Iwai, K, Kagawa, R

13th Int. Symp. on Application of Laser Techniques on Fluid Mechanics,   2006

In-situ fuel concentration measurement near spark plug by 3.392 mm infrared absorption method - Pressure and temperature dependence of the gasoline molar absorption coefficient

Nobuyuki Kawahara, Eiji Tomita, Atsushi Nishiyama, Kenta Hayashi

SAE Technical Papers   2006

Local equivalence ratio measurement of CH4/Air and C3H8/Air laminar flames by Laser-Induced Breakdown Spectroscopy

Ikeda, Y. Nishiyama, A., *Kawahara, N. Tomita, E. Nakayama, T

44th AIAA Aerospace Sciences Meeting and Exhibit   2006

Visualization of Atomization Process of DISI Injector

KAWAHARA Nobuyuki, TOMITA Eiji, NAKAYAMA Tomohiro, SUMIDA Mamoru

14   115 - 120   2005.11

In-situ unburned gas temperature measurement in a spark ignition engine using laser interferometry

Nobuyuki Kawahara, Eiji Tomita, Kenji Ohnishi, Kazuhiro Goto

SAE Technical Papers   2005

Concentration Measurement of Unburned Hydrocarbons in Exhaust Gas from an SI Engine by Using 3.392 micrometer Absorption Method

Tomita, E, Kawahara, N

6th JSME-KSME Thermal Engineering Conference,   2005

In-spark-plug sensor for analyzing the initial flame and its structure in an SI engine

Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Shigeyuki Arimoto, Akira Takeuchi

SAE Technical Papers   2005

点火プラグ実装型燃料濃度計測センサ

河原伸幸, 冨田栄二

日本機械学会誌   Vol.108, No.1037, p311. ( 1037 )   311 - 311   2005

Fuel Breakup near Nozzle Exit of Multi-Hole Injector for DISI Engine

Kawahara, N. Tomita, E. Nakayama, T. Sumida, M

18th Internal Combustion Engine Symposium (International)   2005

Local stoichiometry measurement of CH4/Air and C3H8/Air laminar flames by LIBS

Ikeda, Y. Nishiyama, A., *Kawahara, N. Tomita, E. Kurahashi, T

Pacifichem 2005   2005

Highly spatially resolved time evolution of laser-induced air plasma spectrum

Kawahara, N. Tomita, E. Nakayama, T. Kurahashi, T. Ikeda, Y. Nishiyama, A

Pacifichem 2005   2005

LDV/PDAの基礎と応用

河原伸幸

機械の研究   Vol.57, No.9, pp.937-944. ( 9 )   937 - 944   2005

超音波浮揚における液滴近傍音響流のPIV計測

河原伸幸, 冨田栄二

微粒化   2005

In-spark-plug sensor for analyzing the initial flame and its structure in an SI engine

Yuji Ikeda, Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Shigeyuki Arimoto, Akira Takeuchi

SAE Technical Papers   2005

Measurement of flame propagation characteristics in an SI engine using micro-local chemiluminescence technique

Nobuyuki Kawahara, Eiji Tomita, Akira Takeuchi, Shigeyuki Arimoto, Yuji Ikeda, Atsushi Nishiyama

SAE Technical Papers   2005

Liquid Sheet Break-up of High-Pressure Swirl Injector for DISI Engine(Spray Technologies, Atomization)

Kawahara Nobuyuki, Tomita Eiji, Kasahara Daisuke, Sumida Mamoru

The ... international symposium on diagnostics and modeling of combustion in internal combustion engines   2004 ( 6 )   279 - 285   2004.8

Spray Flame and Ambient Gas Entrainment in a Closed Combustion Vessel

TOMITA Eiji, IMAHASHI Takeshi, KAWAHARA Nobuyuki, KIMOTO Taizou

2004 ( 42 )   241 - 242   2004.3

PIV Measurement of High-Pressure Swirl Injector Spray near Nozzle Exit for DISI Engine

Kawahara, N. Tomita, E. Fukuda, D. Sumida, M

7th International Congress on Optical Particle Characterization,   2004

Fuel breakup near nozzle exit of high-pressure swirl injector for gasoline direct injection engine

Nobuyuki Kawahara, Eiji Tomita, Daisuke Kasahara, Takashi Nakayama, Mamoru Sumida

SAE Technical Papers   2004

In situ Measurement of Fuel Concentration of Hydrocarbon near Spark Plug in an Engine Cylinder by 3.392 μm Infrared Laser Absorption Method (Application to Actual Engine)

Eiji Tomita, Nobuyuki Kawahara, Atsushi Nishiyama, Masahiro Shigenaga

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   70 ( 690 )   518 - 524   2004

In situ Measurement of Fuel Concentration of Hydrocarbon near Spark Plug in an Engine Cylinder by 3.392μm Inframed Laser Absorption Method (Discussion of Applicability with Homogeneous Methane-Air Mixture)

Eiji Tomita, Nobuyuki Kawahara, Masahiro Shigenaga, Atsushi Nishiyama

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   70 ( 690 )   511 - 517   2004

Development of Combustion Facility of Constant-Volume Vessel for Investigation Combustion Characteristics of Bunker Fuel Oil

TOMITA E.

Proc. of 24th CIMAC (Kyoto), 2004   2004

Combustion Characteristics and Performance of Supercharged Single Cylinder Natural Gas Engine Ignited with Pilot Injection of Diesel Fuel

Tomita, E., *Kawahara, N. Kinoshita, Y. Komoda, T. Sakane, A

FISITA 2004,   2004

Homogeneous Charge Compression Ignition Combustion with Dimethyl Ether (Effect of Stratified Fuel Concentration)

Kawahara, N. Tomita, E. Arimoto, S

FISITA 2004,   2004

Time-Series A/F Analysis in a SI Engine by Micro-Local Chemiluminescence Technique(Measurement, Species)

Ikeda Yuji, Kawahara Nobuyuki, Tomita Eiji

The ... international symposium on diagnostics and modeling of combustion in internal combustion engines   2004 ( 6 )   455 - 462   2004

Liquid Sheet Break-up of High-Pressure Swirl Injector for DISI Engines

Kawahara, N. Tomita, E. Kasahara, D. Sumida, M

Proc. of 6th COMODIA 2004,   2004

Temperature Measurements of Laminar Propane/Air Premixed Flame using Detailed OH* Spectra Intensity Ratio

Y. Ikeda, T. Kurahashi, *N. Kawahara, E. Tomita

12th Int. Symp. on Application of Laser Techniques on Fluid Mechanics,   2004

Measurement of Unburned Gas Temperature in an SI Engine Using Fiber-Optic Laser Interferometry

Kawahara, N. Tomita, E. Takasu, K. Goto, K

12th Int. Symp. on Application of Laser Techniques on Fluid Mechanics,   2004

Spectrum Analysis of Chemiluminescence in HCCI Combustion with Dimethyl Ether

Kawahara, N. Tomita, E

Lean Combustion Technology II, Engineering Foundation   2004

Diluted and Stoichiometric Combustion of Dual Fuel (Methane and Gas Oil) Engine with HCCI Concept

Tomita, E, Kawahara, N

Lean Combustion Technology II, Engineering Foundation   2004

Effects of swirl turbulent flow field and stratified concentration field on combustion of fuel-air mixture in a constant volume vessel (2nd report, effects of concentration field and turbulence flow field on combustion characteristics)

Atsushi Nishiyama, Eiji Tomita, Nobuyuki Kawahara, Sadami Yoshiyama, Yoshisuke Hamamoto

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   70 ( 692 )   1092 - 1099   2004

In-situ fuel concentration measurement near spark plug by 3.392 μm infrared absorption method-application to a port injected lean-burn engine

Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita, Masahiro Fujiwara, Naohiro Ishikawa, Kazuhiro Kamei, Keiichi Nagashima

SAE Technical Papers   2004

LDV，PDAの基礎と応用

河原伸幸

No.04-45講習会基礎教育講習会‐エンジンにおける実験・計測の基礎と応用（その 9），日本機械学会エンジンシステム部門，   pp.11-18   2004

赤外線吸収法を利用した点火栓近傍燃料濃度センサの開発

冨田栄二, 河原伸幸

工業加熱，   Vol.41, No.3, pp.10-16 ( 3 )   10 - 16   2004

レーザ計測によるエンジン内諸現象の観察

河原伸幸

若手研究最前線，エンジンテクノロジー，   No.30,pp.52-59 ( 1 )   52 - 59   2004

LDV，PDAの基礎と応用

河原伸幸

No.03-101講習会基礎教育講習会‐エンジンにおける実験・計測の基礎と応用（その 8），日本機械学会エンジンシステム部門，   pp.11-18   2004

インジェクタのノズル近傍における噴霧形成過程の可視化

河原伸幸

第12回微粒化フォーラム「噴霧特性の測定原理と実習」テキスト，   pp.37-43   2004

Real Time HC Concentration Measurement in Exhaust Gas from A Spark-Ignition Engine by Using 3.392 m Absorption Method

Tomita, E, Kawahara, N

Journal of KONES International Combustion Engines,   2004

Characteristics of Combustion and Exhaust Emissions in a Dual Fuel Engine with HCCI Concept -Diluted and Stoichiometric Combustion-

Tomita, E, Kawahara, N

Homogeneous Charge Compression Ignition Symposium   2004

PIV Measurement of Acoustic Streaming around Droplet in an Acoustic Levitator

KAWAHARA Nobuyuki, TOMITA Eiji, EGUSA Hajime

12   335 - 339   2003.12

Visualization of Liquid Sheet Breakup near the Nozzle Exit of Swirl Injector

KAWAHARA Nobuyuki, TOMITA Eiji, KASAHARA Daisuke

12   249 - 253   2003.12

In sita measurement of hydrocarbon fuel concentration near a spark plug in an engine cylinder using the 3.392 mu m infrared laser absorption method: application to an actual engine

E Tomita, N Kawahara, A Nishiyama, M Shigenaga

MEASUREMENT SCIENCE AND TECHNOLOGY   14 ( 8 )   1357 - 1363   2003.8

High-speed and Microscopic Observation of Primary Spray Structure of High-Pressure Gasoline Injector

KAWAHARA Nobuyuki, TOMITA Eiji, NAKAYAMA Takashi

Journal of the Visualization Society of Japan   23 ( 1 )   49 - 52   2003.7

A Study on Behavior of Transient Dimethyl Ether Sprays

KAWAHARA Nobuyuki, TOMITA Eiji, AKAZAWA Sadaki

2003 ( 41 )   215 - 216   2003.2

A Study on Irregular Combustion Improvement of Small Two-Stroke Engine

TOMITA Eiji, NAKATANI Koushin, KAWAHARA Nobuyuki, INAGE Katsunori

2003 ( 41 )   227 - 228   2003.2

水素を用いた内燃機関の新燃焼法に関する研究

河原伸幸

（財）実吉奨学会，平成13年度研究報告集   Vol.20, pp.35-38   2003

LDA，PDAの基礎と応用（応用例：噴霧粒子径および速度の同時計測など），

河原伸幸

第89回講習会エンジニアのための基礎からのレーザ応用最新技術，日本機械学会中国四国支部   pp.23-30   2003

多種噴霧／工業分野

河原伸幸

微粒化   Vol.12, No.39, pp.105-107   2003

In-Situ Fuel Concentration Measurement with Optical Spark Plug Sensor by 3.39 m Infrared Laser Absorption Method

Nishiyama, A, Kawahara, N, Tomita, E, Shigenaga, M

19th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS)   2003

Effects of Swirl Flow and Inhomogeneous Concentration Fields on Combustion of Propane-Air Mixture in a Constant-Volume Vessel

Tomita, E, Nishiyama, A, Kawahara, N

19th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS)   2003

Analysis of Two-Stage Heat Release in HCCI Combustion with Dimethyl Ether

Kawahara, N, Tomita, E, Kagajyo, H

19th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS)   2003

Microscopic Observation of Primary Spray Structure of High-Pressure Swirl Injector for Gasoline Direct Injection Engine

KAWAHARA N.

The 9th Int. Conf. on Liquid Atomization and Spray Systems (ICLASS 2003)   2003

In-situ fuel concentration measurement near spark plug by 3.392 μm infrared absorption method-application to spark ignition engine

Atsushi Nishiyama, Nobuyuki Kawahara, Eiji Tomita

SAE Technical Papers   2003

Effects of early injection and nitrogen dilution on characteristics of combustion and exhaust emissions in a methane/light oil diesel engine

Eiji Tomita, Nobuyuki Kawahara, Zhenyu Piao, Ryoichi Yamaguchi

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   69 ( 680 )   988 - 994   2003

Transient temperature measurement of unburned gas in an engine cylinder using laser interferometry with a fiber-optic sensor

Nobuyuki Kawahara, Eiji Tomita, Mitsuru Ichimiya, Kouji Takasu, Naoki Tsuchida, Kazuhiro Goto

SAE Technical Papers   2003

Effects of swirl turbulent flow field and stratified concentration field on combustion of fuel-air mixture in a constant volume vessel (1st report, combustion characteristics of stratified mixture)

Atsushi Nishiyama, Eiji Tomita, Nobuyuki Kawahara, Sadami Yoshiyama, Yoshisuke Hamamoto

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   69 ( 687 )   2531 - 2538   2003

In situ measurement of hydrocarbon fuel concentration near a spark plug in an engine cylinder using the 3.392 μm infrared laser absorption method: Discussion of applicability with a homogeneous methane-air mixture

Eiji Tomita, Nobuyuki Kawahara, Masahiro Shigenaga, Atsushi Nishiyama, Robert W. Dibble

Measurement Science and Technology   14 ( 8 )   1350 - 1356   2003

Transient temperature measurement of unburned gas using optical heterodyne interferometry

Nobuyuki Kawahara, Eiji Tomita, Hiroshi Kamakura

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   69 ( 677 )   229 - 235   2003

In situ measurement of hydrocarbon fuel concentration near a spark plug in an engine cylinder using the 3.392 μm infrared laser absorption method: Application to an actual engine

Eiji Tomita, Nobuyuki Kawahara, Atsushi Nishiyama, Masahiro Shigenaga

Measurement Science and Technology   14 ( 8 )   1357 - 1363   2003

TED-AJ03-403 COMBUSTION AND EXHAUST EMISSIONS IN A HYDROGEN FUELED ENGINE IGNITED WITH LIGHT OIL :

Tomita Eiji, Kawahara Nobuyuki, Piao Zhenyu, Yamaguchi Ryoichi

Proceedings of the ... ASME/JSME Thermal Engineering Joint Conference   2003 ( 6 )   138 - 138   2003

Homogeneous charge compression ignition combustion with dimethyl ether - Spectrum analysis of chemiluminescence

Nobuyuki Kawahara, Eiji Tomita, Hisashi Kagajyo

SAE Technical Papers   2003

TED-AJ03-397 HOMOGENEOUS CHARGE COMPRESSION IGNITION COMBUSTION WITH DIMETHYL ETHER : ANALYSIS OF TWO-STAGE HEAT RELEASE :

Kawahara Nobuyuki, Tomita Eiji, Kagajyo Hisashi

Proceedings of the ... ASME/JSME Thermal Engineering Joint Conference   2003 ( 6 )   143 - 143   2003

In-situ fuel concentration measurement near spark plug by 3.39 MM infrared absorption method (development of a double-pass optical sensor)

A. Nishiyama, N. Kawahara, E. Tomita

International Symposium on Combustion Abstracts of Works-in-Progress Posters   169   2002.12

Flame propagation and combustion characteristics of stratified charge propane-air mixture with swirling flow in a constant-volume vessel

A. Nishiyama, E. Tomita, N. Kawahara, S. Yoshiyama, Y. Hamamoto

International Symposium on Combustion Abstracts of Works-in-Progress Posters   207   2002.12

Fiber-optic heterodyne interferometry temperature measurement of unburned gas in a HCCI engine fueled with DME

Nobuyuki Kawahara, Eiji Tomita, Mitsuru Ichimiya

International Symposium on Combustion Abstracts of Works-in-Progress Posters   170   2002.12

Concentration measurement of hydrocarbon inside an exhaust pipe by using infrared absorption technique in a spark ignition engine

TOMITA Eiji, KAWAHARA Nobuyuki, NAKAMIZO Yamato

2002 ( 40 )   151 - 152   2002.2

Combustion and Exhaust Emissions in a Dual Fuel Diesel Engine with Early Injection

TOMITA Eiji, KAWAHARA Nobuyuki, YAMAGUCHI Ryouichi, PIAO Zhenyu

2002 ( 40 )   153 - 154   2002.2

Unburned gas temperature measurement in a spark-ignition engine using fibre-optic heterodyne interferometry

N Kawahara, E Tomita, H Kamakura

MEASUREMENT SCIENCE AND TECHNOLOGY   13 ( 1 )   125 - 131   2002.1

レーザ干渉法を利用した高応答・高精度温度センサの開発

河原伸幸

新エネルギー・産業技術総合開発機構，平成１２年度即効産業技術研究助成事業，研究成果報告書   2002

Effects of EGR and early injection of diesel fuel on combustion characteristics and exhaust emissions in a methane dual fuel engine

Eiji Tomita, Nobuyuki Kawahara, Zhenyu Piao, Ryoichi Yamaguchi

SAE Technical Papers   2002

Effects of EGR and early injection of diesel fuel on combustion characteristics and exhaust emissions in a methane dual fuel engine

Eiji Tomita, Nobuyuki Kawahara, Zhenyu Piao, Ryoichi Yamaguchi

SAE Technical Papers   2002

In situ fuel concentration measurement near spark plug in spark-ignition engines by 3.39 μm infrared laser absorption method

Eiji Tomita, Nobuyuki Kawahara, Sadami Yoshiyama, Akihiko Kakuho, Teruyuki Itoh, Yoshisuke Hamamoto

Proceedings of the Combustion Institute   29 ( 1 )   735 - 741   2002

Transient temperature measurement of unburned gas using optic heterodyne interferometry

N Kawahara, E Tomita, H Kamakura

LASER TECHNIQUES FOR FLUID MECHANICS   157 - 172   2002

In situ fuel concentration measurement near spark plug in spark-ignition engines by 3.39 μm infrared laser absorption method

Eiji Tomita, Nobuyuki Kawahara, Sadami Yoshiyama, Akihiko Kakuho, Teruyuki Itoh, Yoshisuke Hamamoto

Proceedings of the Combustion Institute   29 ( 1 )   735 - 741   2002

An Optical Sensor Instrumented in Spark Plug for In-situ Fuel Concentration Measurement in an Engine Cylinder by 3.39 mm Infrared Absorption Method,

Tomita, E, Kawahara, N, Shigenaga, M, Yoshiyama, S, Hamamoto, Y, Kakuho, A, Itoh, T, Dibble, R.W

11th Int. Symp. on Application of Laser Techniques on Fluid Mechanics   2002

Transient Temperature Measurement of Unburned Gas in an Engine Cylinder Using Fiber-Optic Heterodyne Interferometry,

Kawahara, N, Tomita, E, Kamakura, H, Ichimiya, M

11th Int. Symp. on Application of Laser Techniques on Fluid Mechanics   2002

In situ fuel concentration measurement near spark plug in spark-ignition engines by 3.39 μm infrared laser absorption method

Eiji Tomita, Nobuyuki Kawahara, Sadami Yoshiyama, Akihiko Kakuho, Teruyuki Itoh, Yoshisuke Hamamoto

Proceedings of the Combustion Institute   29 ( 1 )   735 - 741   2002

(2-08) Effects of Swirl Turbulent Flow Field and Inhomogeneous Concentration Field on Combustion of Fuel-Air Mixture in a Constant Volume Vessel((SI-3)S. I. Engine Combustion 3-Flow and Combustion)

KAWAHARA Nobuyuki, TOMITA Eiji, YOSHIYAMA Sadami, NISHIYAMA Atsushi, HAMAMOTO Yoshisuke

The ... international symposium on diagnostics and modeling of combustion in internal combustion engines   ( 1 )   29 - 29   2001.7

408 Effects of Pressure and Temperature on Absorption Coefficient of Hydrocarbon Fuels at Wavelength of 3.39μm

TOMITA Eiji, KAWAHARA Nobuyuki, YOSHTYAMA Sadami, KITAGAWA Kazunori

2001 ( 39 )   135 - 136   2001.2

401 Behavior of Unsteady Fuel Spray under Pressurized Surrounding Conditions

KAWAHARA Nobuyuki, TOMITA Eiji, KASHIMURA Ryo

2001 ( 39 )   121 - 122   2001.2

409 Measurement of Temperature Distribution during Quenching Process of Premixed Flame between Two Parallel Round Plates with Laser Interferometry

TOMITA Eiji, KAWAHARA Nobuyuki, USUDA Kazuya

2001 ( 39 )   137 - 138   2001.2

Transient temperature measurement of gas using fiber optic heterodyne interferometry

Nobuyuki Kawahara, Eiji Tomita, Hiroshi Kamakura

SAE Technical Papers   2001.1

光ヘテロダイン干渉法によるガス温度変化計測

河原伸幸, 冨田栄二

光アライアンス   Vol.12, No.12, pp.18-21 ( 12 )   18 - 21   2001

Hydrogen combustion and exhaust emissions ignited with diesel oil in a dual fuel engine

Eiji Tomita, Nobuyuki Kawahara, Zhenyu Piao, Shogo Fujita, Yoshisuke Hamamoto

SAE Technical Papers   2001

Effects of swirl turbulent flow field and inhomogeneous concentration field on combustion of fuel-air mixture in a constant volume vessel

Kawahara, N, Tomita, E, Nishiyama, A, Yoshiyama, S, Hamamoto, Y

Proc. of 5th COMODIA 2001   2001

Combustion Characteristics of Stratified Fuel-Air Mixture with Swirl in a Constant-Volume Vessel

Nishiyama, A, Tomita, E, Kawahara, N, Hamamoto, Y, Yoshiyama, S

Proc. of 3rd ASPACC   2001

Laser diagnostics of gun-type spray (clustering and compound-cluster combustion of liquid spray)

Nobuyuki Kawahara, Yuji Ikeda, Tsuyoshi Nakajima

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   67 ( 655 )   841 - 848   2001

808 Observation of One-Dimensional Flame Propagation in Layered Fuel Concentration Field in a Constant-Volume Vessel

TOMITA Eiji, KAWAHARA Nobuyuki, HAMAMOTO Yoshisuke

5 ( 2 )   247 - 248   2000.10

802 Optical Diagnostics of Direct Injection Gasoline Hollow-Cone Spray at Pressurized Surrounding Condition

KAWAHARA Nobuyuki, TOMITA Eiji, KASHIMURA Ryo

5 ( 2 )   235 - 236   2000.10

Effect of acoustic streaming on the mass transfer from a sublimating sphere

N Kawahara, AL Yarin, G Brenn, O Kastner, F Durst

PHYSICS OF FLUIDS   12 ( 4 )   912 - 923   2000.4

314 Exhaust Emissions in a Dual Fuel Homogeneous Charge Combustion Diesel Engine

TOMITA Eiji, KAWAHARA Nobuyuki, HAMAMOTO Yoshisuke, FUJITA Shogo, PIAO Zhenyu

5 ( 1 )   107 - 108   2000.2

310 Infrared Absorption Measurement of Fuel Concentration History in Combustion Chamber using Sensor Plug

TOMITA Eiji, KAWAHARA Nobuyuki, YOSHIYAMA Sadami, SAIKA Toshiki, HAMAMOTO Yoshisuke

5 ( 1 )   99 - 100   2000.2

Transient Temperature Measurement of Unburned Gas Using Optic Heterodyne Interferometry

Kawahara, N, Tomita, E, Kamakura, H

10th Int. Symp. on Application of Laser Techniques on Fluid Mechanics   2000

E308 A Study on Hydrogen Combustion Ignited with Light Oil in a Dual Fuel Engine(Engine performance) :

TOMITA Eiji, KAWAHARA Nobuyuki, HAMAMOTO Yoshisuke, PIAO Zhen-Yu, FUJITA Shogo

Proceedings of the ... JSME-KSME Thermal Engineering Conference   3   "3 - 415"-"3-420"   2000

B307 Flame Propagation of Inhomogeneous Feel-Air Mixture with Swirl in a Constant-Volume Vessel(Turbulent flame-2) :

KAWAHARA Nobuyuki, TOMITA Eiji, YOSHIYAMA Sadami, NISHIYAMA Atsushi, HAMAMOTO Yoshisuke

Proceedings of the ... JSME-KSME Thermal Engineering Conference   3   "3 - 109"-"3-114"   2000

Fuel Concentration Measurement near Spark-Plug in a Spark-Ignition Engine by 3.39m Infrared Laser Absorption Method

Tomita, E, Kawahara, N, Yoshiyama, S, Hamamoto, Y

Proc. of 22nd Task Leaders Meeting, Int. Energy Agency Executive Committee on Energy Conservation and Emission Reduction in Combustion   2000

Measurements of the combustion characteristics of compound clusters in pressure-atomized spray flame

Nobuyuki Kawahara, Yuji Ikeda, Tsuyoshi Nakajima

37th Aerospace Sciences Meeting and Exhibit   1999.1

Effects of different kinds of fuel and fuel equivalence ratio on flame structure of triple flame

Hiroshi Yamashita, Nobuyuki Kawahara, Nag Jung Choi

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   65   775 - 782   1999.1

Size-classified droplet dynamics of combusting spray in 0.1 MW oil furnace

Nobuyuki Kawahara, Yuji Ikeda, Tsuyoshi Nakajima

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   65 ( 630 )   790 - 797   1999.1

The development of a light-collecting probe with high spatial resolution applicable to randomly fluctuating combustion fields

Fumiteru Akamatsu, Takashi Wakabayashi, Shohji Tsushima, Masashi Katsuki, Yukio Mizutani, Yuji Ikeda, Nobuyuki Kawahara, Tsuyoshi Nakajima

Measurement Science and Technology   10 ( 12 )   1240 - 1246   1999.1

Observation of Compound-Cluster Combustion in Pressure-Atomized Spray Flame

Kawahara, N, Ikeda, Y, Nakajima, T

Proc. of 2nd ASPACC   1999

Observation of Droplet Group Combustion Structure using Local Chemiluminescence Measurement

KAWAHARA Nobuyuki, IKEDA Yuji, NAKAJIMA Tsuyoshi

8   69 - 74   1999

Droplet Size and Velocity Measurement in Spray Flame Using Phase Doppler Anemometry

KAWAHARA Nobuyuki

Journal of High Temperature Society.   24 ( 3 )   102 - 110   1998.5

Development of a Multi-Color light collection probe with high spatial resolution (1st Report, Evaluation of spatial resolution by Ray-Tracing Method)

Takashi Wakabayashi, Fumiteru Akamatsu, Masashi Katsuki, Yukio Mizutani, Yuji Ikeda, Nobuyuki Kawahara, Tsuyoshi Nakajima

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   64 ( 619 )   925 - 930   1998.1

Droplet dispersion and turbulent structure in a pressure-atomized spray flame

Nobuyuki Kawahara, Yuji Ikeda, Tsuyoshi Nakajima

35th Aerospace Sciences Meeting and Exhibit   1997.1

Fuel droplet dynamics and dispersion of practical twin-fluid atomizer for oil furnace

Y. Ikeda, N. Tsuchimoto, N. Kawahara, T. Nakajima

International Journal of Fluid Mechanics Research   24 ( 1-3 )   138 - 148   1997

Flame holding in a gun-type oil burner (fluctuation characteristics and concentration variation)

Yuji Ikeda, Nobuyuki Kawahara, Tsuyoshi Nakajima

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   62 ( 596 )   1599 - 1607   1996.1