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针对水工质脉冲等离子体推进器的高电阻造成推功比低这一情况,本文提出在水工质中添加低电离势的易电离元素Na和K以提高其性能,并通过放电电流测量和等离子体发射光谱分析实验进行验证.实验研究表明:Na和K对脉冲等离子体推进器性能的提高有一定影响.NaCl和KCl水溶液工质与水工质相比,具有较低的总电阻和较高的推功比和比冲.其中,NaCl水溶液工质对脉冲等离子体推进器性能的影响比KCl水溶液工质略高.等离子体发射光谱分析与放电电流测量实验一致.Na和K致使水工质的等离子体发射光谱信号强度得到增强.
In view of the fact that the high resistance of hydrokinetic pulsed plasma thruster results in low push ratio, this paper proposes to add low ionization potentials of easily ionized elements Na and K to the water medium to improve its performance. And by measuring the discharge current Plasma emission spectra analysis experiments.Experimental studies show that: Na and K on the performance of pulsed plasma thrusters have an impact.NaCl and KCl aqueous solution compared with the water medium, with a lower total resistance and more High push ratio and specific impulse. Among them, the working fluid of NaCl aqueous solution has a slightly higher effect on the performance of the pulsed plasma thruster than the working fluid of KCl aqueous solution. The plasma emission spectrum analysis is consistent with the discharge current measurement experiment. The plasmonic emission spectrum signal intensity is enhanced.