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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.
Aiming at the discharge process in the Hall thruster channel, a simulation model based on COMSOL software is established. The model takes the drift diffusion of electrons and ions inside the plasma as the core. Combining the electromagnetic field, gas flow and the collision reaction inside the plasma, Reasonable selection of system equations, boundary conditions and solvers can effectively estimate the performance parameters of Hall thruster and the distribution of each physical quantity in the channel.The simulation results are compared with the theory to verify the effectiveness of the model for Hall thruster numerical simulation And based on the magnetic field optimization design thrusters.