Abstract: A gas flow model with laser plasma as heat source was developed based on axial symmetric Euler equations in the laser propulsion rocket engine absorption chamber. MacCormark predictor corrector scheme was employed to simulate both CW laser propulsion flow and RP laser propulsion flow The engines parameters such as temperature, pressure, stream trace distribution and mach number were gained. The results were analyzed and the influence of single-point focusing heating mode on the engine performance was discussed. Some groundwork for further study of laser propulsion numerical simulation were offered.

Key words: Laser propulsion;Laser plasma;Thruster;Flow field simulation;Numerical simulation

摘要： 以轴对称非定常欧拉方程为基础,建立了激光推进火箭发动机吸收室内纯气相单组分、以激光等离子体为内热源的流场模型。用MacCormark预测 校正格式编写了模拟计算程序;并对连续波和连续脉冲两种激光输入方式的激光推进火箭发动机的内部流场分别进行了模拟计算,得出了发动机相应的内部流场的温度、压强、流线及马赫数的分布情况。对计算结果进行了分析,并讨论了单点聚焦加热方式对发动机性能的影响。为进一步的激光推进数值模拟研究奠定了基础。

关键词: 激光推进;激光等离子体;推力器;流场仿真;数值仿真