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VACUUM ›› 2022, Vol. 59 ›› Issue (3): 12-15.doi: 10.13385/j.cnki.vacuum.2022.03.03

• Vacuum Acquisition System • Previous Articles     Next Articles

Numerical Simulation on Internal Pressure Variation of Test Specimens During Vacuum Test

LIU Sheng, CUI Yu-hao, DOU Ren-chao, SHI Li-xia, SUN Li-chen, REN Guo-hua, YAN Rong-xin   

  1. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
  • Received:2021-05-31 Online:2022-05-25 Published:2022-06-01

Abstract: Nowadays, more and more vacuum test need to detect pressure inside the test specimens. Although direct installation of sensors is the most effective and accurate way to measure the pressure of the test specimens. However sometimes sensors cannot be installed in the test specimens, which makes direct measurement difficult to be realized. In this paper, internal pressure of test specimens under molecular flow was simulated by the method of Monte Carlo. Geometric model of test specimens were established. Material degassing quantity was considered. The variation of vacuum degree with time was calculated under molecule flow. This paper provides a theoretical basis for the pressure prediction of specific location during vacuum test.

Key words: vacuum degree, Monte Carlo method, molecule flow, numerical simulation

CLC Number: 

  • TB752
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