宏观放电参数对大功率霍尔推力器点火启动过程初始阶段影响的研究  

Study on Influence of Macroscopic Discharge Parameters on Initial Stage of Ignition Process in High Power Hall Thrusters

作　　者：李文博[1] 蔡海阔 廖岩 成渭民[2] 孙建宁 高前 魏立秋 于达仁[1] LI Wenbo;CAI Haikuo;LIAO Yan;CHENG Weimin;SUN Jianning;GAO Qian;WEI Liqiu;YU Daren(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Xi’an Microelectronic Technology Institute,Xi’an 710065,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [2]西安微电子技术研究所,西安710065

出　　处：《载人航天》2020年第3期310-316,共7页Manned Spaceflight

基　　金：载人航天预先研究项目(050401)。

摘　　要：为研究宏观放电参数对大功率霍尔推力器点火初始阶段的影响,首先在一台10 kW霍尔推力器上实验测量了点火初始阶段不同宏观放电参数下的阳极电流变化特性,然后采用PIC数值模型计算了不同放电电压和质量流量下点火初始阶段阳极电流和离子密度的变化特性。结果表明:增大放电电压与质量流量都能够增大点火启动过程初始阶段阳极电流的上升斜率,而增大磁场强度会降低点火启动过程初始阶段阳极电流的上升斜率;放电电压和质量流量的改变不会引起点火初始阶段电子和中性气体发生碰撞电离位置的改变。To study the influence of macroscopic discharge parameters on the initial stage of the ignition process of high power Hall thruster,the anode current variation characteristics under different macroscopic discharge parameters in the initial stage of ignition were experimentally measured on a 10 kW Hall thruster.Then,the particle-in-cell(PIC)numerical model was used to calculate the variation characteristics of the anode current and the ion density in the initial stage of ignition process under different discharge voltages and mass flow rates.The results showed that increasing the discharge voltage and mass flow rate could increase the rising slope of the anode current in the initial stage of the ignition process.However,increasing the magnetic field intensity could decrease the rising slope of the anode current in the initial stage of the ignition process.At the same time,the changes in discharge voltage or mass flow rate did not cause a change in the collision ionization position of the electron and neutral gas atoms in the initial stage of ignition process of Hall thruster.

关 键 词：大功率霍尔推力器 点火启动 PIC数值模拟 宏观放电参数 

分 类 号：V423.7[航空宇航科学与技术—飞行器设计]