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 *** addition to the radiator,the sublimator is reco...
详细信息
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 *** addition to the radiator,the sublimator is recommended as one of the promising options for heat *** sublimator makes use of water to freeze and sublimate in a porous medium,rejecting heat to the vacuum *** 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 *** 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 *** visualized experiments and results prove that the freezing ice is divided into the porous ice-peak and the transparent *** the sublimation progresses,the phase-change interface moves downward steadily,the length of the ice-peak increases,but the icicle *** 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.
暂无评论