研究者詳細 - 堀部　明彦

論文 - 堀部　明彦

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冷却面上に置かれた液滴の凍結挙動に関する研究査読

堀部明彦, 福迫尚一郎, 山田雅彦

日本冷凍協会論文集 12 ( 1 ) 63 - 71 1995年

記述言語：日本語出版者・発行元：公益社団法人日本冷凍空調学会

An experimental study has been performed to investigate the freezing characteristics of an aqueous binary solution droplet on a cooled wall. Pure water, ethylene-glycol aqueous solutions of 1to 10 mass%, and NaCl aqueous solutions of 1 to 15 mass% in concentration were adopted as the testing solutions. The droplet was frozen under a variety of cooling conditions such as wall temperature, air temperature, air velocity, and solute concentration in both the static atmosphere and the cold air flow. The observations on both the freezing characteristics and the morphologies of the droplet were extensively carried out. In addition, the inside flow of the droplets were observed. It was found that the morphology of the droplet on the cooled wall varied markedly depending on the solution, which appears to be mainly caused by the difference in the surface tension of the solution. On the other hand, under the conditions with a cold air flow, initial freezing point of the droplet was found to be mainly owing to the cooling rate between the cooled wall and the cold air.

DOI： 10.11322/tjsrae.12.63

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Continuous Production Characteristics of Liquid Ice by Use of Fluidized Bed 査読

S.Fukusako, M.Yamada, A.Horibe, K.Hatakeyama, H.Kawabe

ASME Paper ( HTD-284 ) 137 - 144 1994年

液滴噴霧によるリキッドアイス迅速生成挙動に関する研究査読

堀部明彦, 福迫尚一郎, 山田雅彦

日本冷凍協会論文集 11 ( 1 ) 79 - 87 1994年

Melting Characteristics of a Horizontal Ice Cylinder Immersed in Saline Water : Effect of Liquid Depth to Saline Water Surface 査読

S.Fukusako, M.Yamada, A.Horibe, C.Watanabe

ASME Paper ( HTD-271 ) 81 - 87 1994年

MELTING-POINT AND SUPERCOOLING CHARACTERISTICS OF MOLTEN-SALT 査読

M YAMADA, M TAGO, S FUKUSAKO, A HORIBE

THERMOCHIMICA ACTA 218 401 - 411 1993年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

Melting points of some kinds of molten salts have been determined, and also supercooling characteristics of potassium thiocyanate KSCN and calcium chloride CaCl2 have been investigated. Molten salt has been utilized as a thermal storage material, cooling material for the nuclear reactor, refinement of the petroleum, fuel battery, molten-salt reactor because of its excellent thermal characteristics and chemical stability. Therefore, it is important for its utilization to store the data of thermophysical properties to control both the melting and solidification processes. The sample of molten salt is both heated and cooled depending on the prescribed heating-cooling temperature curves in the electric furnace with a controller. The melting points were determined as the constant temperatures which can be observed for some period in the cooling process. Furthermore, the supercooling characteristics were investigated under various sample masses and cooling rates as parameters. It was found that the degree of supercooling depended closely on both the cooling rate and the sample mass.

DOI： 10.1016/0040-6031(93)80439-H

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FREEZING CHARACTERISTICS ALONG A HORIZONTAL COOLED TUBE IMMERSED IN AQUEOUS BINARY-SOLUTION WITH MAIN FLOW 査読

M YAMADA, S FUKUSAKO, M TAGO, A HORIBE

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME 115 ( 1 ) 54 - 62 1993年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ASME-AMER SOC MECHANICAL ENG

An experimental study has been performed to investigate the freezing characteristics of an aqueous binary solution along a horizontal cooled tube. A copper coaxial cooling tube was set horizontally in a flow duct which has cross-sectional dimensions of 120 mm x 200 mm. Ethylene-glycol solution was utilized as a test solution. Observation of frozen layer, measurement of heat-transfer coefficient, and visualization of flow pattern were extensively carried out under a variety of concentration of the solution, initial temperature, cooling temperature, and flow velocity as parameters. It was found that the characteristics of the frozen layer could be well grouped using both the Reynolds number and the cooling temperature ratio, and that the flow field had a considerable effect on the characteristics of the frozen layer. The correlations of the averaged frozen-layer thickness at the steady state were determined.

DOI： 10.1115/1.2902157

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FREEZING CHARACTERISTICS OF AN AQUEOUS-SOLUTION DROPLET INSTALLED ON A WALL 査読

A HORIBE, S FUKUSAKO, M YAMADA, M TAGO, O OKAGAKI

TRANSPORT PHENOMENA IN THERMAL ENGINEERING, VOLS 1 AND 2 326 - 331 1993年

AN EXPERIMENTAL-STUDY OF ICE-LAYER TRANSITION PHENOMENA IN A RECTANGULAR DUCT CONTAINING WATER-FLOW 査読

M TAGO, S FUKUSAKO, M YAMADA, A HORIBE

WARME UND STOFFUBERTRAGUNG-THERMO AND FLUID DYNAMICS 28 ( 1-2 ) 37 - 47 1993年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：SPRINGER

Measurements of both the velocity and turbulence-intensity distributions above an ice-layer surface along flow direction have been performed to clarify the ice-layer transition phenomena observed in a rectangular duct. The test duct which has a lower cooled wall kept less than the freezing temperature of water with cross-sectional dimension of 50 mm by 19 mm was used in the present measurements. The velocity and turbulence-intensity distributions in the test duct were measured using Laser Doppler Velocimeter set up on the two-dimensional traversing table. The freezing experiments were carried out under the condition of uniform water-flow rate even after the ice layer has developed in the test duct. It was found that inlet water flow tended to be laminarized under an influence of developing ice layer, and that onset of the ice-layer transition phenomena might be closely related to an increase in turbulence intensity in the water flow above the developing ice-layer surface.

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矩形断面を有する二次元返しベンド内の凍結挙動査読

田子真, 福迫尚一郎, 山田雅彦, 堀部明彦

日本冷凍協会論文集 10 ( 1 ) 37 - 47 1993年

DIRECT-CONTACT HEAT-TRANSFER CHARACTERISTICS FROM A LIQUID ICE LAYER 査読

M YAMADA, S FUKUSAKO, A HORIBE

EXPERIMENTAL HEAT TRANSFER, FLUID MECHANICS AND THERMODYNAMICS, 1993, VOLS 1 AND 2 1-2 1682 - 1687 1993年

Freezing Heat Transfer in a Horizontal Cooled Circular Tube with the Separated Region 査読

M.Yamada, S.Fukusako, A.Horibe, Y.Abe

ASME Paper 92-WA ( HT-7 ) 1 - 8 1992年

矩形断面を有する二次元返しベンド凸面上の凍結挙動査読

田子真, 福迫尚一郎, 山田雅彦, 堀部明彦

日本機械学会論文集B編 58 ( 553 ) 2863 - 2870 1992年

記述言語：日本語出版者・発行元：The Japan Society of Mechanical Engineers

An experimental study has been performed to investigate the freezing behavior on the convex wall of a return bend with a rectangular cross section. The experiments were carried out for the duct heights of 17mm and 30mm with a duct width of 300mm and a radius of curvature of 159mm. The convex wall temperature was uniformly maintained below the freezing temperature of water, while the concave wall was insulated. It was found that step wise ice formation was observed on the convex wall of the return bend and that the step position at the steady-state condition was closely dependent on both the water-flow velocity and the cooling-temperature ratio.

DOI： 10.1299/kikaib.58.2863

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溶融塩の融点および過冷却・凝固挙動査読

田子真, 福迫尚一郎, 山田雅彦, 堀部明彦

熱物性 6 ( 3 ) 154 - 161 1992年

記述言語：日本語出版者・発行元：JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES

溶融塩は、熱媒体、化学反応媒体として優れているため、この特性を応用した溶融塩関連技術の研究開発が進められている。これらの応用技術を確立する上で、溶融塩に関する熱物性値を把握することが必要不可欠であり、信頼できるデータの蓄積が期待されている。<br>本研究は、溶融塩の基本的な物性値の一つである融点の測定を行い、合わせて過冷却および凝固挙動について検討したものである。

DOI： 10.2963/jjtp.6.154

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海水滴による着氷挙動に関する研究査読

堀部明彦, 福迫尚一郎, 山田雅彦, 成田恵一

日本冷凍協会論文集 9 ( 1 ) 43 - 51 1992年

海水噴霧を伴う寒冷気流中に置かれた水平円柱周りの着氷限界熱伝達査読

堀部明彦, 福迫尚一郎, 山田雅彦, 田子真

日本機械学会論文集B編 57 ( 544 ) 4209 - 4215 1991年

記述言語：日本語出版者・発行元：一般社団法人日本機械学会

An experimental study has been performed to investigate the de-icing heat transfer characteristics along a horizontal cylinder immersed within a cold forced air flow with spraying seawater. Experiments were carried out under a variety of experimental parameters such as air velocity, air temperature, droplet diameter, and spraying liquid content. The location of onset of the ice pieces was observed to change markedly according to the condition of droplet size and air stream. It was also found that the heat-transfer characteristics along the cylinder under de-icing conditions were mainly affected by sensible heat values of the impinging droplets.

DOI： 10.1299/kikaib.57.4209

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Freezing characteristics along a horizontal cooled tube immersed in aqueous binary solution with main flow

M. Yamada, S. Fukusako, M. Tago, A. Horibe

American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD 175 35 - 43 1991年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：Publ by ASME

An experimental study has been performed to investigate the freezing characteristics of an aqueous binary solution along a horizontal cooled tube. A copper tube 41.2 mm in diameter was set horizontally in a flow duct which has cross-sectional dimensions of 120 mm × 200 mm. Ethylene-glycol solution was utilized as a test solution. The concentration of the solution, initial temperature, cooling temperature, and flow velocity were set as parameters, and observation of frozen layer and visualization of flow pattern were extensively carried out. It was found that the characteristics of the frozen layer could be well grouped using both the Reynolds number and the cooling temperature ratio, and that the flow field had a considerable effect on the characteristics of the frozen layer. The correlations of the averaged frozen-layer thickness at the steady-state were determined.

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ICE ACCRETION CHARACTERISTICS ALONG A CIRCULAR-CYLINDER IMMERSED IN A COLD AIR STREAM WITH SEAWATER SPRAY 査読

S FUKUSAKO, A HORIBE, M TAGO

EXPERIMENTAL THERMAL AND FLUID SCIENCE 2 ( 1 ) 81 - 90 1989年1月

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