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运用磁流体动力学的方法,建立脉冲等离子体推力器工作过程模型,展开三维仿真研究,对推进剂的烧蚀传热过程进行分析。通过该模型计算得到的推进剂烧蚀质量和元冲量能够反映出实验结果的大体趋势,同时针对不同电容以及两种不同推力室构型的情况进行了评估。结果显示,推进剂的温度变化波形反映着放电波形的变化波形,影响着推力室等离子体的流动,良好的推进剂表面温度分布更有助于推进剂的喷射过程。
By using the method of magnetohydrodynamics, the working process model of the pulsed plasma thruster was established, and the three-dimensional simulation was carried out to analyze the ablation heat transfer process of the propellant. The projectile ablation quality and the element impulse calculated by the model can reflect the general trend of the experimental results, and evaluate the different capacitances and the configurations of two different thrust chambers at the same time. The results show that the temperature waveform of the propellant reflects the waveform of the discharge waveform and affects the plasma flow in the thrust chamber. The good propellant surface temperature distribution is more helpful to the propellant injection process.