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脉冲等离子体推力器电离机制数值分析

DOI: 10.13336/j.1003-6520.hve.2015.09.019, PP. 2958-2964

Keywords: 脉冲等离子体推力器,中性气体,电离机制,质量流量,推进剂利用率

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Abstract:

为了提高脉冲等离子体推力器(pulsedplasmathrusters,PPT)的推进剂利用率和总效率,深入研究推力器的物理机理,建立了能模拟PPT工作时中性气体电离过程的模型,并以LES-6和XPPT-1的PPT为对象,进行了数值仿真。结果表明计算得到LES-6和XPPT-1的推进剂利用率分别为16.32%和81.04%,电子数密度分别为6.56×;1021m-3和5.83×;1021m-3,与实验结果相近,能反映出推进剂效率随放电能量增大而增大的趋势,可以用于PPT电离情况的模拟;PPT的推进剂利用率低主要由极板电压和中性气体供给不匹配造成,极板电压无法一直满足新烧蚀出的中性气体的电离条件。

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