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Research on Cryogenic Characteristics in Spatial Cold-Shield System
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所属单位:兰州交通大学
发表刊物:Advanced Materials Research
关键字:Infrared Radiation;Liquid Nitrogen;Spatial Cold Shield;Equivalent Radiation
摘要:A spatial cold-shield system with cryogenic phase change refrigeration was studied to decrease the surface temperature of spacecraft under 100 K and surface infrared intensity under 0.5 W/m2 within 30 minutes in space. A 3-D unit and systematic model were established to simulate the real structures and the variation regularities of the major parameters under different flying periods. A simplified unit model and a systematic model were established to simulate the heat-transfer and flow-field of cold shield in cryogenic, vacuum and micro-gravitational conditions. The unit and systematic experiments were carried out to study the cryogenic phase change refrigeration in cold shield on the ground. The results indicated the simulated and experimented parameters of cold-shield were consistent with the designing conditions of spacecraft. The systematic model could make the LN<sub>2</sub> touching the surface easily and causing the surface temperature distributed more uniformly. The cold-shield could meet the requirement of cryogenic infrared intensity by phase change refrigeration in space.
合写作者:Jiaxing Xue
第一作者:Zhou Wei Zhang
论文类型:期刊论文
通讯作者:Yahong Wang
论文编号:20143618131889
学科门类:工学
文献类型:J
卷号:3383
期号:1008-1009
是否译文:是
发表时间:2014-10-22
收录刊物:EI