微波等离子推进器性能预示的工程算法

ENGINEERING ALGORITHM OF MICROWAVE PLASMA THRUSTER PERFORMANCE PREDICTION

对微波等离子推进器提出一种快速性能预估的工程算法。假设谐振腔内的工质参数均匀、气体与微波之间的能量耦合良好、喷管内流动为一维管流，利用等离子体的等温模型可以快速地对微波等离子推进器性能进行估算。采用可变节点划分方法处理喷管流场，避免了喉部奇点。计算给出一系列不同输入微波功率、工质流量及放电管内压强条件下合理的发动机性能参数。

A fast engineering algorithm of Microwave Plasma Thruster (MPT)performance prediction was presented.It was assumed that the parameters of actuating medium were uniform,the coupling efficiency of energy between gas and microwave was very fine,the flow field in nozzle was one dimension tube flow,and the iso temperature model of plasma was considered.Then the performance of MPT was calculated fastly.Using adaptive meshes to deal with the nozzle flow , the abnormal point at throat can be avoided.A series of MPT performances under the different conditions of input microwave power,mass flow rate and pressure were computed.