Abstract: The plume from the attitude controlling rocket motor nozzle has an obvious effect on the aircraft in vacuum. Computation based on the Simons model for vacuum plume was presented considering the expansion of the isentropic core and boundary layer. The vacuum plume parameters distribution was obtained. Simons model is a rapid estimation method for vacuum plume calculation in the design of attitude controlling rocket motor nozzle on the satellite, airship and other aircraft, as well as the test research.

Key words: Attitude controlling rocket engine;High altitude environment;Plume;Numerical calculation

摘要： 姿态控制发动机真空环境下工作产生的羽流对航天器造成的影响非常明显。用Simons法对真空羽流流场进行了解析计算,包括等熵核心区和边界层膨胀区的计算,得到了符合流动规律的结果。这是一种快速计算真空羽流场物理参数分布的方法。工作对卫星、飞船和空间站上的姿态控制发动机的工程设计和科学实验具有参考价值。

关键词: 姿控火箭发动机;高空环境;羽流;数值计算