论文部分内容阅读
为了揭示水工质脉冲等离子体推力器(WPPT)的工作特性,探究WPPT运行过程中的能量分布及性能影响机制,提出了一种新的性能仿真模型。该模型能够定量化地描述WPPT放电等离子体的产生及其电磁和气动耦合加速效应,简单且快速有效地评估电推力器的宏观性能。以东京大学的实验样机为对象进行模型验证和仿真研究。结果表明:计算所获得的元冲量、比冲等性能参数与实验数据较符合;脉冲消耗工质中约20%被离子化和加速排出;该推力器的电容储能(E_0=13.5 J)转换成加速动能的能量转换效率约为40%,其中仅14%用于电磁加速。最后基于此模型分析不同推力器电参数和推力室构型参数对性能的影响,研究结果对推力器的设计具有重要意义。
In order to reveal the working characteristics of hydro-mechanical pulse plasma thruster (WPPT) and to explore the energy distribution and performance influencing mechanism during WPPT operation, a new performance simulation model is proposed. The model can quantitatively describe the generation of WPPT discharge plasma and its electromagnetic and aerodynamic coupling acceleration effects, and evaluate the macro performance of the electric thruster simply and quickly. The experimental prototype of Tokyo University was used to verify the model and simulate it. The results show that the performance parameters such as meta-impulse and specific impulse obtained by the calculation are in good agreement with the experimental data. About 20% of the impulsive working medium is ionized and expelled exponentially. The capacitive energy storage (E_0 = 13.5 J) The energy conversion efficiency for accelerating kinetic energy is about 40%, of which only 14% is for electromagnetic acceleration. Finally, based on this model, the influence of different thruster electrical parameters and thrust chamber configuration parameters on performance is analyzed. The research results are of great significance for the design of thrusters.