Abstract: The main character of high altitude exhaust plume impingement effects was analyzed.The impingement effects were calculated using DSMC method for two typical surface positions and compared with that of engineering approximate method.The results show that DSMC method can accurately describe the force and heat load induced by plume impingement while engineering approximate method has limitations in its application.

Key words: Attitude control rocket engine;High altitude environment;Plume;Impingement effects +;Numerical simulation

摘要： 分析了姿控发动机高空羽流撞击效应的特点，应用ＤＳＭＣ方法数值求解了由于高空羽流撞击流场中的表面而产生的力及热效应，并与工程估算方法进行了比较。结果表明：ＤＳＭＣ方法能够精确描述羽流撞击表面所产生的力及热效应，工程估算方法的应用则具有较大的局限性。

关键词: 姿控火箭发动机;高空环境;羽流;撞击效应;数值仿真