小功率氮电弧推力器的性能  

Performance of very low-power nitrogen arcjet thruster

作　　者：王洋[1,2] 孟显 潘文霞[2] WANG Yang1,2 , MENG Xian2 , PAN Wenxia2(1. College of Science, Donghua University, Shanghai 201620, China; 2. The State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, Chin)

机构地区：[1]东华大学理学院,上海201620 [2]中国科学院力学研究所高温气体动力学国家重点实验室,北京100190

出　　处：《航空动力学报》2018年第2期508-512,共5页Journal of Aerospace Power

基　　金：国家自然科学基金(11475239)

摘　　要：采用自然辐射冷却结构的小功率电弧推力器,实现了以氮气为推进剂的长时间稳定运行。采用间接测力方法得到推力,利用铜镜反射法拍摄喉道处的放电状态,结合测量的弧电压、弧电流和气流量数据以及导出的比冲和推力效率,对推力器运行性能和放电特性进行了研究。结果显示:在气流量为100~700mL/min,输入功率为35~55W的条件下,最大推力约为24mN,最大比冲接近175s,当弧电流为80~120mA范围内变化时,弧电压变化范围为420~520V,并且弧电压随气流量的增加呈现出先下降后上升的趋势。Very low-power arcjet thrusters with natural-radiation-cooled nozzle can stably operate for a long period of time by using nitrogen as the propellant.Thrust was measured indirectly using impinging force method,the end-on photos of discharge status within the nozzle were taken through a 45°inclined copper mirror.Performance and discharge characteristics of the very low-power arcjet thruster were analyzed according to the experimental data of thrust,specific impulse,thrust efficiency,arc voltage and arc current.Results showed that the maximum thrust was up to 24 mN and the maximum specific impulse was close to 175 s,when the gas flow rate was within the range of 100-700 mL/min and input power of 35-55 W;with the increase of arc current from 80-120 mA,the arc voltage varied from 420-520 V,and the arc voltage showed the rising trend after falling with the increase of gas flow rate.

关 键 词：小功率电弧推力器 推力 比冲 推力效率 伏安特性 

分 类 号：V439.4[航空宇航科学与技术—航空宇航推进理论与工程]