Papers - KAWAHARA Nobuyuki
-
Effect of swirl flow on the main chamber combustion dynamics of methane in a passive pre-chamber spark ignition engine
MD. Tanvir Khan, Nobuyuki Kawahara, Yoshimitsu Kobashi, Isao Yamane, Towa Hirayama, Ayumi Shimizu, Sekai Miyamoto
Fuel 391 134735 - 134735 2025.7
-
Development of Ignitability Evaluation Index by Optical Combustion Analyzer
Nayuha Moriguchi, Yoshimitsu Kobashi, Nobuyuki Kawahara, Masahide Takagi, Satoshi Kawauchi
The 28th Small Powertrains and Energy Systems Technology Conference (SETC 2024), Poster 2024.11
-
Improvement of Lean Burn Characteristics with Ozone Addition in a Diesel Micro-Pilot Natural Gas Engine Reviewed
Yoshimitsu Kobashi, Shoki Miyata, Nobuyuki Kawahara, Ryuya Inagaki
The 28th Small Powertrains and Energy Systems Technology Conference (SETC 2024), JSAE 20249104/ SAE 2024-32-0104 2024.11
-
Hydrogen concentration measurements using spark induced breakdown spectroscopy in a real engine Reviewed
Dongchan Kim, Quancen Wan, Qing Nian Chan, Yoshimitsu Kobashi, Nobuyuki Kawahara, Sanghoon Kook
Proceedings of the Combustion Institute 40 ( 1-4 ) 105209 - 105209 2024.6
-
Droplet diameter and axial velocity measurements near a nozzle exit of an automotive fuel injector using PDA Invited
Nobuyuki Kawahara
2023.10
-
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
-
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
-
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
-
Cagdas Aksu, Nobuyuki Kawahara, Kazuya Tsuboi, Morio Kondo, Eiji Tomita
FUEL 185 243 - 253 2016.12
-
Yungjin Kim, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita
APPLIED ENERGY 182 539 - 547 2016.11
-
Ulugbek Azimov, Nobuyuki Kawahara, Eiji Tomita
FUEL 182 807 - 815 2016.10
-
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
-
Md Tasyrif Abdul Rahman, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 40 ( 13 ) 4717 - 4725 2015.4
-
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
-
Mithun Kanti Roy, Nobuyuki Kawahara, Eiji Tomita, Takashi Fujitani
PROCEEDINGS OF THE COMBUSTION INSTITUTE 34 2977 - 2984 2013
-
Ulugbek Azimov, Nobuyuki Kawahara, Eiji Tomita
FUEL 98 164 - 175 2012.8
-
Robert Kiplimo, Eiji Tomita, Nobuyuki Kawahara, Sumito Yokobe
APPLIED THERMAL ENGINEERING 37 165 - 175 2012.5
-
Ulugbek Azimov, Masahiro Okuno, Kazuya Tsuboi, Nobuyuki Kawahara, Eiji Tomita
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36 ( 21 ) 13793 - 13807 2011.10
-
U. Azimov, E. Tomita, N. Kawahara, Y. Harada
INTERNATIONAL JOURNAL OF ENGINE RESEARCH 12 ( 5 ) 484 - 497 2011.10
-
Ulugbek Azimov, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36 ( 18 ) 11985 - 11996 2011.9
-
Murari Mohon Roy, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada, Atsushi Sakane
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36 ( 12 ) 7339 - 7352 2011.6
-
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
-
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
-
Murari Mohon Roy, Eiji Tomita, Nobuyuki Kawahara, Yuji Harada, Atsushi Sakane
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35 ( 2 ) 844 - 853 2010.1
-
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
-
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
-
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
-
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
-
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
-
FUKATANI Nobuhiko, TOMITA Eiji, KAWAHARA Nobuyuki, MARUYAMA Keiji, KOMODA Tetsuo
Transactions of the Japan Society of Mechanical Engineers B 73 ( 730 ) 1337 - 1344 2007
-
Takasu Isao, Kan Tadayuki, Takasaki Koji, Tomita Eiji, Kawahara Nobuyuki
JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 39 ( 4 ) 250 - 258 2004