Simulation Study on Magnetic Shielding Field Design and Channel Structure Optimization of Hall Thruster

被引：0
|
作者：
Chen L. [1 ]
Kan Z.-C. [1 ]
Yang Y.-H. [1 ]
Duan P. [1 ]
Jiang B.-R. [1 ]
Gao W.-F. [1 ]
Cui Z.-J. [1 ]
机构：
[1] School of Science, Dalian Maritime University, Dalian
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 07期
关键词：
Channel structure; Hall thruster; Magnetic shielding configuration; Numerical simulation; Soft magnetic materials;
D O I：
10.13675/j.cnki.tjjs.2208107
中图分类号：
学科分类号：
摘要：
The channel wall erosion of Hall thruster caused by high-energy ion bombardment is an important factor limiting thruster lifetime，and the application of magnetic shielding configuration can effectively mitigate the erosion. However，magnetic shielding configuration could reduce the performance of the Hall thruster compared to the traditional structure. In order to design a reasonable magnetic shielding magnetic field，and analyze the influence of channel length and wall arrangement soft magnetic materials on the magnetic shielding effect，the particle-in-cell simulation method is applied to study the plasma discharge process in the channel. The magnetic shielding configuration is established and optimized by adjusting channel length and arranging additional magnetic material along the wall. The results show that magnetic shielding configuration with short channel can achieve less erosion and higher performance. When the channel length is shortened from 30mm to 20mm，the ion radial velocity is reduced by half，the specific impulse increases by 7.78%，the anode efficiency increases by 9.1% and the thrust increases by 8.3%. The additional magnetic material can effectively optimize the magnetic shielding configuration. When the soft magnetic material position moves toward the discharge channel exit，the peak electron temperature decreases，the ion incident angle gradually decreases. When the soft magnetic material is placed 17.5mm from the anode，the thrust increases by 2.9%，both the ion radial velocity and the ion incident angle are minimal，and the wall erosion is expected to be reduced. © 2023 Journal of Propulsion Technology. All rights reserved.
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