Abstract: The plume contamination has several patterns with respect to different contaminational surfaces The prediction of thermal contamination and deposition due to the impingement of the molecular of the back flow region of the nozzle were discussed The program based on the theory of molecule movements and statistical mechanics was composed with analytical methods and was applied to several different conditions, with computational results in conformity with analysis in theory The purpose of this research is to provide a good foundation for the rocket engine design and scientific experiments

Key words: Attitude control rocket engine;Nozzle flow;High altitude environment;Plume;Spacecraft contamination

摘要： 针对普遍关注的羽流逆流污染问题,讨论了喷管出口背部位置受到的回流分子撞击热污染和分子沉积问题,从分子运动论和统计力学出发编制了计算程序,对不同的算例进行了计算,得到符合规律的结果,为火箭发动机设计和科学试验提供了理论依据。

关键词: 姿控火箭发动机;喷管气流;高空环境;羽流;航天器污染