霍尔推力器仿真与优化

摘要

Based on COMSOL soft,a method is established to model the discharge processing in Hall effect thruster (HET) channel.The drift diffusion of electron and ion of the plasma is taken as the kernel of the model.Combined with the electromagnetic field,flow and impact reactions inside plasma,the characteristics of HET and distribution of parameters in the channel can be evaluated with proper selection of equations,boundary conditions and solvers.Compared with the results in theory,numerical sinulation results demonstrate the effectiveness of the proposed approach,and then the magnetic field optimization design is applied.%针对霍尔推力器通道内的放电过程,建立一种基于COMSOL软件的仿真模型.该模型以等离子体内部电子和离子的漂移扩散为核心,结合电磁场、气体流动以及等离子体内部的碰撞反应,通过合理选取系统方程、边界条件以及求解器,有效估算霍尔推力器的性能参数以及各物理量在通道内的分布.将仿真结果与理论相比较,验证该模型用于霍尔推力器数值仿真的有效性并以此对推力器进行磁场优化设计.