前极靴长度对电子回旋共振离子推进器影响的数值仿真  

Numerical Simulation of the Effect of the Front Pole Piece Length on Electron Cyclotron Resonance Ion Thruster

作　　者：柯于俊 孙新锋[1] 陈学康[1] 田立成[1] 贾艳辉[1] KE Yu-jun;SUN Xin-feng;CHEN Xue-kang;TIAN Li-cheng;JIA Yan-hui(Lanzhou Institute of Physics,Lanzhou 730000,Chin)

机构地区：[1]兰州空间技术物理研究所,兰州730000

出　　处：《科学技术与工程》2018年第20期340-346,共7页Science Technology and Engineering

基　　金：民用航天预研项目(D010305);真空低温技术与物理重点实验室基金(YSC0715)资助

摘　　要：数值仿真研究电子回旋共振离子推力器放电室的放电过程可以为推力器的优化设计提供指导和帮助。基于COMSOL多物理场仿真软件建立了5 cm口径电子回旋共振(ECR)推力器放电室的二维轴对称模型。通过磁场实际测量值和仿真结果的对比分析,验证了模型的可靠性;并计算发现前极靴长度在7 mm和9 mm之间存在一个最佳特征值。当小于特征值时电子密度最大值、平均电子密度值和等离子体吸收功率均随极靴长度的增大而增大;而当大于特征值时电子密度最大值、平均电子密度值和等离子体吸收功率则随极靴长度的增大而减小。The numerical simulation of the discharge process for ECRIT will be useful to the optimization design of it.According to the COMSOL Multiphysics software,a two-dimensional axial symmetry model for 5 cm diameter ECR thruster discharge chamber has been developed.The reliability of the model is verified by the comparison of the simulation results to the actual measurement magnetic field.The simulation results show that there is an optimal eigenvalue between the length of 7 mm and 9 mm for the front pole piece.The maximum,the average value of electron density and plasma absorption power will increase when the pole piece length less than the eigenvalue,but decrease when the pole piece length greater than the eigenvalue,with the pole piece length increases.

关 键 词：极靴 ECR 离子推力器 电子密度 

分 类 号：V439.1[航空宇航科学与技术—航空宇航推进理论与工程]