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VACUUM ›› 2022, Vol. 59 ›› Issue (2): 32-37.doi: 10.13385/j.cnki.vacuum.2022.02.07

• Vacuum Acquisition System • Previous Articles     Next Articles

Numerical Simulation and Analysis of Spatial Rapid Decompression Process Based on Dynamic Grid

WANG Jun-wei, GONG Jie, DING Wen-jing, XU Jing-hao, GU Miao, ZHANG Li-ming   

  1. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
  • Received:2021-04-22 Online:2022-03-25 Published:2022-04-14

Abstract: The research of rapid decompression process with its effect assessment and protection technology is the problem that must be faced by the future exploration projects such as near space exploration and deep space exploration. In order to analyze the characteristics of gas flow field in decompression process and predict decompression and equilibrium time more realistically and accurately, a numerical simulation method based on dynamic grid technology was proposed to complete the simulation analysis of the ground simulation facility for decompression. The results show that when the relief valve is not fully opened in place, the pressure of the two chambers is basically equal, the average pressure loss of the elbow is large at the initial stage of decompression, but slows down at the later stage. The analysis method based on dynamic grid technology can overcome the problem of insufficient predictive ability of traditional methods in the opening process of relief valve, and can effectively obtain the gas flow characteristics and pressure change law in the full cycle process of decompression.

Key words: rapid decompression, dynamic grid, numerical simulation, unsteady flow

CLC Number: 

  • V416.5
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