Analysis and Validation of Performance Degradation of Two-Phase Fluid Loop in a Lunar Lander

被引：0
|
作者：
Wang L. [1 ,2 ]
Miao J.-Y. [1 ,2 ]
Zhang H.-X. [1 ,2 ]
Zhang Y.-W. [1 ,2 ]
Chen J.-X. [1 ,2 ]
机构：
[1] Beijing Institute of Spacecraft System Engineering, Beijing
[2] Beijing Key Laboratory of Space Thermal Control, Beijing
来源：
Yuhang Xuebao/Journal of Astronautics | 2019年 / 40卷 / 09期
关键词：
Gravity-driven two-phase fluid loop; Lunar lander; Non-condensable gas; Performance degradation;
D O I：
10.3873/j.issn.1000-1328.2019.09.014
中图分类号：
学科分类号：
摘要：
The increment of the heat transfer temperature difference of the two-phase fluid loop of the Chang'E-3 lander caused by the non-condensable gas is analyzed and tested for the one-year lifetime demand (12 Moon days and nights). The results reveal that at the end of the one-year lifetime, the increment of the heat transfer temperature difference caused by the non-condensable gas is 2.2℃. It reduces the heat supply from the radioisotope heating unit (RHU) to the lander by 0.6W and the temperature of the equipment is reduced by 0.6℃. It can be ignored for the thermal control system. According to the telemetry data, during the period of 12 Moon days and nights, when the two-phase fluid loop works in the range of 45℃~50℃, the increment of the heat transfer temperature difference caused by the non-condensable gas is less than 1.5℃,which is in good agreement with the results of the ground analysis and verification. During the period of 52 Moon days and nights, the heat transfer temperature difference fluctuates in the range 3.5℃~4.7℃, there is no increasing trend, the two-phase fluid loop works well on orbit. © 2019, Editorial Dept. of JA. All right reserved.
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页码：1095 / 1102
页数：7
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