三栅极离子推力器电子反流失效影响参数的敏感性研究

doi:10.13675/j.cnki. tjjs. 190337

推进技术 ›› 2020, Vol. 41 ›› Issue (1): 140-148.DOI: 10.13675/j.cnki. tjjs. 190337

三栅极离子推力器电子反流失效影响参数的敏感性研究

贾艳辉¹,王聪¹,李娟¹,耿海¹,郭宁¹,杨浩¹,王亮¹

兰州空间技术物理研究所真空技术与物理重点实验室，甘肃兰州 730000

出版日期:2020-01-20 发布日期:2020-01-20
作者简介:贾艳辉，博士，高级工程师，研究领域为放电等离子电推力器技术。E-mail：jiayh06@lzu.edu.cn
基金资助:
科工局技术基础科研项目（JSZL2017203B008）；甘肃省科技计划（18JR3RA412）。

Parameter Sensitivity Analysis of Electron Backstreaming Failure Mode for 3-Grid System Ion Thruster

Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics, Lanzhou 730000,China

Online:2020-01-20 Published:2020-01-20

摘要/Abstract

摘要： 电子反流失效模式是离子推力器关键失效模式之一，决定推力器工作寿命。为明确各参数对电子反流失效模式的影响程度，确定加速应力，为地面加速寿命实验验证方案和长寿命优化设计提供数据支持，采用Hybrid-PIC-MCC（Particle in Cell- Monte Carlo Collision）方法，构建了三栅极系统数值仿真模型。采用模型研究了地面真空舱本底压力、屏栅电压、加速栅电压、屏栅与加速栅间距、屏栅上游等离子体密度和放电室工质利用率等参数的影响敏感度对比。研究结果显示,真空舱本底压力可以作为加速寿命试验的首选加速应力，在推力器结构和工作本征参数中工质利用率为最敏感应力，其次是屏栅电压、屏栅上游等离子体密度、加速栅电压、屏栅和加速栅间距。

关键词: 离子推力器;三栅极系统;Hybrid-PIC-MCC方法;敏感度

Abstract: Electron backstreaming is one of the most important failure modes, which determines the operating lifetime of the ion thruster. To gain the sensitivity effect of kinds of parameters on the electron backstreaming failure mode, and obtain the accelerator stress, and provide data and guidance of the ground accelerator lifetime experimental test and long lifetime optimization design, this paper used the Hybrid-PIC-MCC method and established a 3-grid system simulation model to study the comparison of effect sensitivity of the ground vacuum chamber background pressure, the screen grid potential, the accelerator grid potential, the screen-accelerator grid gap, the plasma density upstream the screen grid and the mass utilization efficiency. Simulation results showed that the ground vacuum chamber background pressure was the first-choice accelerator stress for the accelerator lifetime experimental test. Among the geometric and operating parameters, the mass utilization efficiency was the most sensitive one. Other stress factors include the screen grid potential, the plasma density upstream the screen grid, the accelerator grid potential, and the screen-accelerator grid gap.

Key words: Ion thruster;3-grid system;Hybrid-PIC-MCC method;Sensitivity

贾艳辉,王聪,李娟,耿海,郭宁,杨浩,王亮. 三栅极离子推力器电子反流失效影响参数的敏感性研究[J]. 推进技术, 2020, 41(1): 140-148.

JIA Yan-hui¹,WANG Cong¹,LI Juan¹,GENG Hai¹,GUO Ning¹,YANG Hao¹,WANG Liang¹. Parameter Sensitivity Analysis of Electron Backstreaming Failure Mode for 3-Grid System Ion Thruster[J]. Journal of Propulsion Technology, 2020, 41(1): 140-148.

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三栅极离子推力器电子反流失效影响参数的敏感性研究

Parameter Sensitivity Analysis of Electron Backstreaming Failure Mode for 3-Grid System Ion Thruster

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