Microgravity Heat Transfer in Flow Boiling

Haruhiko Ohta

研究成果: ジャーナルへの寄稿評論記事

23 引用 (Scopus)

抄録

To investigate flow boiling in microgravity, test sections of transparent heated tube and transparent heating surface were developed, and heat transfer characteristics were directly related to the liquid-vapor behaviors observed. The experiments were performed on board aircraft where the boiling system was exposed in series to normal, hyper and reduced gravity fields along a parabolic trajectory. In the experiments using a round tube and an analytical model, an important gravity effect on two-phase forced convective heat transfer where heat transfer is deteriorated in microgravity at low mass velocity was clarified. As regards the dryout phenomenon, measurement of critical heat flux was attempted in a short microgravity duration and the process of dryout was investigated for a moderate quality region based on the measured temperature fluctuation and corresponding liquid-vapor behaviors. Flow boiling in narrow channels was also investigated as one of the systems to be applied to space heat exchangers, and a few important characteristics were clarified concerning the gravity effect. Because of the limited opportunity for experiments and the short microgravity duration created by aircraft, the results obtained here could not cover all aspects of the phenomenon for the gravity effects on flow boiling for different systems and parameters, but the results are intended to become a powerful aid for further investigation in the present discipline utilizing longer microgravity periods in a new space platform to be realized soon.

元の言語英語
ページ(範囲)1-76
ページ数76
ジャーナルAdvances in Heat Transfer
37
発行部数C
DOI
出版物ステータス出版済み - 12 1 2003

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Microgravity
microgravity
boiling
Boiling liquids
heat transfer
Heat transfer
Gravitation
gravitation
aircraft
Vapors
Aircraft
Space platforms
space platforms
vapors
tubes
Experiments
high gravity environments
Liquids
convective heat transfer
Heat exchangers

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

これを引用

Microgravity Heat Transfer in Flow Boiling. / Ohta, Haruhiko.

:: Advances in Heat Transfer, 巻 37, 番号 C, 01.12.2003, p. 1-76.

研究成果: ジャーナルへの寄稿評論記事

Ohta, Haruhiko. / Microgravity Heat Transfer in Flow Boiling. :: Advances in Heat Transfer. 2003 ; 巻 37, 番号 C. pp. 1-76.
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