Pool boiling heat transfer in microgravity

J. F. Zhao, N. Yan, J. Li, Z. D. Li, W. R. Hu, Haruhiko Ohta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The pool boiling heat transfer of FC-72 on a plain plate with a heating area of 15*15 mm2 in different pressure and subcooling has been studied experimentally both in normal gravity on the ground and in microgravity aboard the Chinese recoverable satellite SJ-8. A quasi-steady heating method is adopted, in which the heating voltage is controlled as an exponential function with time. Three modes of heat transfer, namely single-phase natural convection, nucleate boiling, and transition boiling, are observed, while the nucleate pool boiling are the major subject for discussion in the present paper. In normal gravity, the present data is compared with those obtained by other researchers, and a satisfactory agreement is evident and warrants reasonable confidence in the data. Compared with terrestrial experiments, the boiling curves in microgravity are considerably gentle, and CHF is no more than 40% of that in terrestrial condition. In microgravity, influences on boiling curves of the pressure and subcooling are similar with those in normal gravity, namely that the heat transfer coefficient and CHF will increase with subcooling for the same pressure, and that they will also increase with pressure for the same subcooling. Copyright IAF/IAA. All rights reserved.

Original languageEnglish
Title of host publicationInternational Astronautical Federation - 58th International Astronautical Congress 2007
Pages468-473
Number of pages6
Volume1
Publication statusPublished - Dec 1 2007
Event58th International Astronautical Congress 2007 - Hyderabad, India
Duration: Sep 24 2007Sep 28 2007

Other

Other58th International Astronautical Congress 2007
CountryIndia
CityHyderabad
Period9/24/079/28/07

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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