Abstract: The process and the pressure of the exhaust gas flowing in the outer space simulated test cabin was analyzed and calculated Based on the one dimensional isentropic flow theory with effects of shock waves, two possible processes of the gas discharged by the tested engine in the outer space simulated test cabin were analyzed, and the pressure was calculated Then,the curves for the pressure change of gas flowing was proposed The results form a base for the design of outer space simulated test cabin and for the vacuum system

Key words: Altitude simulation test;Flow characteristis;Numerical calculation

摘要： 以一维等熵流动理论为基础 ,在充分考虑激波效应的情况下 ,分析了高空模拟试验舱中发动机燃气可能出现的两种流动过程 ,并计算了燃气流动过程的压力变化曲线 ,其结果为高空模拟试验舱的结构设计和真空机组的选配提供了参考。

关键词: 高空仿真试验;流动特性;数值计算