霍尔推力器反向供气结构的数值研究
Numerical investigation of reversed gas feed configurations for Hall thrusters
摘要：
提出了一种霍尔推力器的反向供气结构，并进行了数值研究.作为一种替代标准的直接注射，我们调查的影响，注射推进剂附近的通道出口，并将其向后，朝向阳极。用直接模拟蒙特卡罗方法研究了冷阳极和热阳极条件下的中性密度场和平均速度场。使用测试粒子蒙特卡罗方法计算通道内和电离区域中的中性粒子的停留时间。计算表明，反向注入允许将标准进料配置的质量利用效率从2-5%增加到最大20-30%，这取决于初始效率。
英文摘要：
A reversed gas feed configuration for Hall thrusters is proposed and studied numerically. As an alternative to standard direct injection, we investigate the effect of injecting the propellant near the channel exit and directing it backwards, towards the anode. The resulting neutral density and average velocity fields are studied with the Direct Simulation Monte Carlo method for both cold and warm anode conditions. The residence time of neutral particles inside the channel and in the ionization region is computed using a test-particle Monte Carlo method. The computations indicate that the reversed injection allows for increasing the mass utilization efficiency of a standard feed configuration from 2-5% to a maximum of 20-30% depending on the initial efficiency.
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