脉冲等离子体推力器工作过程一维磁流体动力学数值模拟

One-dimensional Numerical Simulation of Magnetohydrodynamic for Pulsed Plasma Thruster

通过耦合脉冲等离子体推力器(PPT)工作过程中电场、磁场、流场之间的相互作用,描述了电容器放电、推进剂烧蚀、等离子体加速流动等过程,建立了基于磁流体动力学(MHD)的一维非定常数学模型,对PPT的工作过程进行数值模拟。对数值模拟结果作了相应分析,并将部分模拟结果与实验数据进行了比较。结果表明,模型正确反映了推力器放电过程、推进剂烧蚀质量与表面温度的变化趋势。

By way of Coupling the effects among the electric field, magnetic field and flow field in the pulsed plasma thruster, the process of the capacitor discharge, propellant ablation and plasma acceleration are characterized, and a one-dimensional time-dependent model based magnetohydrodynamic (MHD) for PPT is presented in this paper. The simulation results are analyzed and compared with the experiment. The result exhibits that the model perfectly reveals the thruster discharge process, variation of ablated mass and surface temperature of propellant.