真空羽流场的 N-S 和 DSMC 耦合数值模拟

COUPLED NUMERICAL SIMULATION WITH N S AND DSMC ON VACUUM PLUME

关键词:  姿控火箭发动机  喷管气流  流场仿真  纳维尔－斯托克斯方程  蒙特卡罗法

Key words:  Attitude control rocket engine  Nozzle flow  Flow field simulation  Navier Stokes equation  Monte Carlo method

摘要:

根据调姿发动机真空羽流场的特点，采用差分求解Ｎ－Ｓ方程数值模拟喷管内流场，用ＤＳＭＣ方法数值模拟喷管外羽流场，得到了符合流动规律的数值模拟结果。为姿控发动机喷管设计提供了参考，并为真空羽流污染研究打下了良好的基础。

Abstract:

Vacuum plume and its contamination are very difficult problems for the designers in astronautics.Due to the lack of efficient experimental and computational facilities,the research in this field advances slowly.A finite difference method for the N S equation and DSMC methods applied to numerically simulate the vacuum plume of attitude controlling rocket motor nozzle.Vacuum plume parameters distribution which are in good accord with the flow physics was obtained.The present work provides a good reference to the design of attitude controlling rocket motor nozle.It is a good base of vacuum plume contamination study.