连续激光加热推力器性能的简化解析计算模型

A Simple Analytical Model of Performance Prediction for Continuous Wave Laser Powered Thruster

针对具有开放式吸收室的连续激光加热推力器,通过合理简化和分析,建立了一维流推力计算模型。采用该模型计算了实验所用两种推力器的推力,所得结果与实验值吻合较好。根据该模型分析了推力性能与推力器吸收室半径、喉部半径以及激光吸收效率之间的关系。结果表明,推力随吸收效率的提高呈非线性增长,随吸收室半径减小而增大,并随喉部半径减小出现峰值。

Focusing on the thrust calculation of the continuous wave laser-powered thruster with an open absorption chamber,an analytical model is obtained by using one-dimension flow theory under some reasonable simplifications. The calculation results are consistent with the experimental data well. And the thrust curves with different chamber radii,throat radii and absorption efficiencies are given and discussed. The results indicate that the nonlinear improvement of thrust can be induced by higher absorption efficiency. Thrust increases with the chamber radius decreases,meanwhile has a peak as throat radius reduces.