估计飞行器羽流影响的点源流动模型和计算机程序

SOURCE FLOW MODEL OF ESTIMATING THE PLUME EFFECTS ON SPACECRAFT AND CORRESPONDING COMPUTER PROGRAM

关键词:  羽流  喷气排气

Key words:  Plume  Jet exhaust

摘要:

目前和今后使用火箭发动机进行轨道和姿态控制的空间飞行器都要遇到发动机排气羽流影响问题.本文讨论了一种迅速估算轴对称的羽流远流场对飞行器影响的近似分析方法和相应的计算机程序.这种点源分析方法考虑了排气气体和喷管的特性.通过计算发动机排气羽流场,计算排气羽流干扰力矩和推力损失,这些影响在飞行器设计中必须给予考虑和控制.利用该方法和计算机程序对一个卫星模型进行了羽流影响的计算.

Abstract:

Present and future spacecrafts which require jets for orbit adjustment and/or altitude control are always effected by the exhaust plume of the jets.An approximate analysis and corresponding computer program for rapid assessment of effects of plume far from the nozzle exit on spacecraft is discassed in this paper.A source flow model incorporate with the characteristics of the exhaust gas and the nozzle is used in the analysis. After having determined the plume field,the disturbance torques and thrust loss due to plume impingement can be estimated and then, put into the final design. The validation of this method is verified through a numerical example of a satellite model.