Ground-based investigations on phase-moving phenomenon with space sublimation cooling for lunar exploration missions  

作　　者：Enhui LI Yunze LI Jixiang WANG Man YUAN Jingyan XIE Yuehang SUN Lizhu YANG Xianwen NING 

机构地区：[1]School of Aeronautic Science and Engineering,Beihang University,Beijing 100083,China [2]Beijing Key Laboratory of Space Thermal Control Technology,China Academy of Space Technology,Beijing 100094,China

出　　处：《Chinese Journal of Aeronautics》2022年第8期65-74,共10页中国航空学报（英文版）

基　　金：primarily funded by the cooperative project offered by Beijing Key Laboratory of Space Thermal Control Technology;funded by China Postdoctoral Science Foundation(No.2020 M671618)。

摘　　要：The lunar surface is a typical vacuum environment,and its harsh heat rejection conditions bring great challenges to the thermal control technology of the exploration mission.In addition to the radiator,the sublimator is recommended as one of the promising options for heat rejection.The sublimator makes use of water to freeze and sublimate in a porous medium,rejecting heat to the vacuum environment.The complex heat and mass transfer process involves many physical phenomena such as the freezing and sublimation phase change of water in the porous medium and the movement of the phase-change interface.In this paper,the visualized ground-based experimental approaches of space sublimation cooling were presented to reveal the moving law of threephase point and the growth phenomenon of ice-peak and icicle in microchannels under vacuum conditions.The visualized experiments and results prove that the freezing ice is divided into the porous ice-peak and the transparent icicle.As the sublimation progresses,the phase-change interface moves downward steadily,the length of the ice-peak increases,but the icicle decreases.The visualized experiments of space sublimation cooling in the capillary have guiding significance to reveal the sublimation cooling mechanism of water in the sublimator for lunar exploration missions.

关 键 词：Lunar vacuum environment Phase-change flow Space sublimation cooling Unsteady phase-moving phenomenon Visualized ground-based experimental approaches 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计] V444.36