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电弧加热推力器利用直流电弧放电加热推进剂,并将加热后的推进剂通过拉瓦尔喷管高速喷出产生推力。电弧加热推力器的性能与其喷管内部复杂的传热与流动以及能量转换过程密切相关。分别以纯氩、氮、氢气以及氢/氮混合气为电弧加热推力器的推进剂,在推进剂供给流量4～270mg/s,弧电流4～12A,环境压力低于20Pa的条件下,实时检测了自然辐射冷却及推进剂再生冷却喷管的电弧加热推力器在运行过程中的喷管外表面温度、弧电压、产生的推力等参数及其变化,综合分析了喷管温度变化对推力器性能的影响。
The arc-heated thruster heats the propellant by DC arc discharge and ejects the heated propellant through the Laval nozzle at high speed to generate the thrust force. The performance of arc-heated thrusters is closely related to the complex heat transfer and flow inside the nozzle and to the energy conversion process. Respectively, with pure argon, nitrogen, hydrogen and hydrogen / nitrogen mixture for the arc heating thruster propellant, the propellant supply flow 4 ~ 270mg / s, arc current 4 ~ 12A, ambient pressure below 20Pa under the conditions of real-time detection In this paper, the parameters of the external surface temperature of the nozzle, the arc voltage, the thrust force and other parameters during the operation of the natural radiation cooling and propellant regeneration cooling nozzle arc heating thruster are analyzed. The effects of nozzle temperature variation on the performance of the thruster Impact.