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基于光谱方法和羽流探针诊断方法,研究分析了氢组分压力对霍尔推力器束流聚焦特性和振荡特性的影响。研究结果表明,随着罐内氢组分压力的提高,通道内氢的特征谱线强度增强,相比pH=0Pa,pH=0.04Pa下最大HI=652.6nm相对谱线强度增加了8~9倍。氢组分向通道内的返流影响通道内的工质电离和离子加速过程,进而导致推力器束流特性变差,且伴随着低频振荡增大。当pH=0.04Pa时,羽流发散半角为41.5°,相比pH=0Pa条件下增加了24.5°。
Based on the spectroscopic method and the plume probe diagnosis method, the influence of hydrogen component pressure on the focusing characteristics and oscillation characteristics of Hall thruster beam was analyzed. The results show that with the increase of the pressure of the hydrogen component in the tank, the intensity of the characteristic hydrogen line in the channel increases. Compared with pH = 0Pa, the relative line intensity of the maximum HI = 652.6nm at pH = 0.04Pa increases by 8 ~ 9 Times The backflow of hydrogen component into the channel affects the ionization and ion acceleration of the working fluid in the channel, which leads to the deterioration of the flow characteristics of the thruster and the increase of the low frequency oscillation. At pH = 0.04 Pa, the plume divergence half angle is 41.5 °, an increase of 24.5 ° compared to pH = 0 Pa.