TED-AJ03-191 MICROGRAVITY TWO-PHASE FLOW CHARATERISTICS IN ADIABATIC PIPES
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概要
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More reliable design of thermal transport, power acquisition and thermal control/management systems for space use requires a through understanding of the flow hydrodynamic, the differences and similarities between the two-phase flow characteristics of two-phase flow influenced by the change in gravity. The data of flow patterns, void fraction, frictional pressure drop associated with its characteristics were obtained at normal gravity and in microgravity and hyper-gravity (2g) conditions aboard MU-300 aircraft capable of parabolic trajectory flying. Some experiments were performed for an air-water two-phase flow through 10mm diameter adiabatic test section with 600mm length of transparent acrylic resin horizontal tube. The obtained experimental data covered a range of liquid and gas flow rates with the liquid superficial velocity ranging from 0.095m/s to 2.56m/s, and the gas superficial velocity ranging from 0.032m/s to 21.08m/s. The results obtained at three gravity levels (μg, 1g and 2g) are compared with some of the existing models and correlations. Flow pattern results obtained under μg, 1g and 2g conditions were compared with void fraction based flow pattern transition models developed by Bousman (1995). In the comparisons of the microgravity void fraction results with the correlation proposed by Inoue-Aoki (1970), it was found that the micorgravity void fraction was greater than the model as 42% for bubbly flow region. Two-phase frictional pressure drops obtained under three g-levels were compared with each other, and it also showed that frictional pressure drop were well fitted with the Lockhart-Martinelli-Chisholm model. As results, the gravity dependency of flow patterns was more clearly appeared with the decrease in gas and liquid flow rates. The effect of gravity on two-phase flow frictional pressure drop was insignificant for the turbulent flow regions.
- 一般社団法人日本機械学会の論文
著者
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Fujii Terushige
Department Mechanical Of Engineering Kobe University
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Asano Hitoshi
Department Of Mechanical Engineering Kobe University
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Asano H
Department Of Mechanical Engineering Kobe University
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CHOI Buhong
Department of Mechanical Engineering, Kobe University
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SUGIMOTO Katsumi
Department of Mechanical Engineering, Kobe University
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Choi Buhong
Department Of Mechanical Engineering Kobe University
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Asano Hitoshi
Dept. Of Mech. Eng. Kobe University
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Asano Hitoshi
Faculty Of Engineering Kobe University
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Asano Hitoshi
Department Of Applied Chemistry Faculty Of Engineering Gunma University
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Sugimoto Katsumi
Faculty Of Engineering Kobe University
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Sugimoto Katsumi
Department Of Mechanical Engineering Kobe University
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