环境压强对电弧喷射推力器性能的影响

为了详细研究环境压强对电弧喷射推力器性能的影响,对低功率氮氢电弧喷射推力器在不同环境压强下的工作性能进行了比较计算。采用二阶精度无波动、无自由参数的耗散差分格式(NND格式)和经典龙格库塔方法求解耦合电磁源项的N-S方程组,采用高斯-塞德尔超松弛迭代方法数值求解电磁场方程。计算结果给出了不同环境压强下推力器的推力、比冲、推进效率和出口平面冲量密度分布。结果分析定量地阐释了环境压强对推力器性能的影响,能为推力器的实验研究及空间应用提供参考。

Influence of Environmental Pressureon Arcjet Thruster Performance

To investigate the influence of environmental pressure on arcjet thruster performance,computation of operating performance of a low power nitrogen/hydrogen arcjet thruster under various environmental pressures was performed.Non-oscillating and non-free-parameter dissipative finite difference scheme with second order accuracy and classical Runge-Kutta time-stepping scheme was used to solve Navier-Stokes equations coupled with electromagnetic source terms,and Gauss-Seidel over-relaxation iteration method was adopted to solve electromagnetic equation.The results present thrust,specific impulse and thrust efficiency of the thruster under various environmental pressures,as well as impulse density distribution on the exit plane.Analyses of the results demonstrate influence of the environmental pressure on arcjet thruster performance quantitatively,and provide reference for its experimental investigation and its space application.