期刊
ACTA ASTRONAUTICA
卷 157, 期 -, 页码 455-464出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actaastro.2019.01.022
关键词
Evacuation method; Outgassing rate; Lunar regolith simulant; Environment simulator; Drilling test
资金
- China Academy of Space Technology
- NSFC Key project [51635002]
- NSFC-Guangdong Joint Fund [U1401240]
- Frontier and Key Technology Innovation Special Funds of Guangdong Province [2017B050506008, 2016B090911002]
- Program of Foshan Innovation Team of Science and Technology [2015IT100072]
A novel method to evacuate large bins of lunar regolith simulant for deep drilling tests was proposed in the current work. This method can be used to simulate a vacuous lunar regolith environment to a maximum penetration depth of 2 m. An experimental apparatus was built and is composed of a vacuum chamber, a specially designed regolith container and a vacuum pumping system. A pressure on the order of 10 Pa could be reached with the 4.3 m(3) vacuum chamber when compacted lunar regolith simulant with a volume of 0.4 m(3) was loaded. A theoretical model to predict vacuum degree was proposed bas'ing on the viscous flow theory. Evacuation experiments with or without lunar regolith simulant inside the chamber were performed and the outgassing properties of lunar regolith simulant was experimentally studied. The results show that the outgassing rate of the lunar regolith simulant was about 10(7) times to that of the electro-polished stainless-steel.
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