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采用氢气和氮气的摩尔比r在1.0~2.0范围的混合气体作为推进剂,实时检测电弧加热推力器运行中的弧电流、弧电压、入口压力、真空室压力、质量流量和喷口温度等工作参数,研究了比功率、r和质量流量对推力器产生的推力、比冲和推力效率的影响。实验结果表明,同时增加混合气体的质量流量和r能有效提高推力器的推力;较高的r能获得高的比冲和效率,尤其是比冲随着r的提高明显地单调上升。
The working parameters of arc current, arc voltage, inlet pressure, vacuum chamber pressure, mass flow rate and nozzle temperature are measured in real time using the mixed gas with the molar ratio of hydrogen and nitrogen in the range of 1.0 ~ 2.0 as the propellant , The effect of specific power, r and mass flow on thrust, specific impulse and thrust efficiency generated by the thruster was investigated. The experimental results show that increasing the mass flow rate and r of the mixed gas can effectively increase the thrust of the thruster. Higher r can achieve higher specific impulse and efficiency, especially the specific impulse increases monotonically with the increase of r.