电弧等离子体发动机初步研究

对一实验电弧加热式发动机二维轴对称亚跨超音速流动进行了数值模拟,所采用的方法是矢通量分裂算法.通过计算可以得出密度、速度、温度、压力和马赫数的分布.给出了计算所使用的网格和一些计算结果.简要介绍了实验所使用的设备,如电源系统、点火系统、推进剂供给系统、电弧加热式发动机、推力测量装置和真空系统.对所观察到的一些工作现象进行了讨论.有三种不同的不稳定性出现于实验过程.除了所测量的一些重要参数,通过实验发现氩比氮工作更稳定.

Preliminary Study on Arcjet

The two dimensional axisymmetric subsonic transonic supersonic flow in an experimental arcjet thruster is simulated numerically using flux vector splitting method.The profiles of density,velocity,temperature,pressure and Mach number can be obtained by the computation.The computation grid and some computed results are given here.The test equipment such as power supply system,ignition system,propellant supply system,arcjet thruster,thrust measuring device and vacuum system are introduced briefly.Some working phenomena of the arcjet are observed and discussed.Three different kinds of instability appeared in the process of the experiments.Except some important parameters are measured,it is found that the operating stability of Argon is better than that of Nitrogen.