IMECH-IR  > 国家微重力实验室
Alternative TitleExperimental Study on the Condensation of FC-72 with and without the Gravity
Thesis Advisor刘秋生
Degree Grantor中国科学院大学
Place of Conferral北京
Degree Discipline流体力学
Keyword空间实验 Fc-72冷凝 冷凝速率 换热系数 不可凝气体




Other Abstract

When human has been researched the outer space continuously, space equipment not only need to adapt the environment of microgravity, but also need to accommodate the sharp leap of temperature, especially using the efficient heat dissipation facilities at the high temperature. In this paper, during the flight time of TZ-1 spacecraft, based on ”two phase system experimental platform key technology research” project , we used a specialized experiment developed by our laboratory to perform a set of space experiments which research the mechanism of the heat and dynamic of the evaporation and condensation。

According to the FC-72 condensation experiment dates by “two phase system experimental platform key technology research” project, such as the temperature of substrate, the temperature of the vapor upon the substrate, the gas pressure, the heat flux of condensation, we accurately confirm the beginning point of condensation by different ways. In different initial pressure, we analysis the effect of non-condensation gas on space condensation. The results appear non-condensation gas can slower the process of condensation. In the equipment, the condensation processes are recorded by the side-camera so we quantificationally calculated the rate of FC-72 condensation in the first time, which has not appeared in any international space experiments papers. In regard to the half-moon shape distribution of substrate temperature, we simulate the structure heat conduction by COMSOL, and provide the optimization of the design of substrate。

Heat transfer coefficient is the key research problem in theory and engineering. In this paper, we analyzed the condensation experiments in ground and space environment and we concluded the relationship between heat transfer coefficient and the non-condensation gas. In space condensation, upon the substrate, FC-72 gas and non-condensation gas was stratified which effect gas mixing in the cavity. So, the non-condensation gas has little effect on condensation heat transfer in the space compared with in the ground.

Call NumberMas2018-036
Document Type学位论文
Recommended Citation
GB/T 7714
张峥智. FC-72蒸汽冷凝地面与空间实验研究[D]. 北京. 中国科学院大学,2018.
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