Numerical Simulation on Pole Erosion in a Magnetically Shielded Hall Thruster

被引：0
|
作者：
Liu Q. [1 ,2 ]
Hu Y.-L. [1 ,2 ]
Mao W. [1 ,2 ]
Yao Z.-P. [1 ,2 ]
Li Y. [1 ,2 ]
机构：
[1] Beijing Institute of Control Engineering, Beijing
[2] Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology, Beijing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 06期
关键词：
Hall thruster; Ion current density; Magnetic shielding; Numerical simulation; Pole erosion;
D O I：
10.13675/j.cnki.tjjs.2208102
中图分类号：
学科分类号：
摘要：
The problem of pole erosion becomes the main ineffective mode of lifetime for magnetic shielding Hall thruster. In order to study the mechanisms of the pole erosion，a numerical model of thruster discharge process was established based on particle-in-cell method. Combining with the sputtering model，the erosion phenomenon was simulated. Statistics on the motion of the collected ions sputtering on the poles could provide pole erosion characteristics. Then the erosion mechanisms and the influential factors on the pole erosion rate were analyzed. The numerical results show that in the region of high neutral density near the channel exit chamfer，the radial electric field dominates，where newborn ions at low velocity tend to diverge radially and move to the poles. The poles are unevenly eroded and the erosion rate at the center of the inner pole is much higher than the other radial positions due to the ions in confinement of the axisymmetric electric field in the vicinity of the inner pole. © 2023 Journal of Propulsion Technology. All rights reserved.
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