5千瓦霍尔推力器磁场优化及Particle-in-Cell性能仿真

Magnetic Field Optimization and Particle-in-Cell Performance Simulation of a 5 Kilowatt Hall Thruster

为了提升兰州空间技术物理研究所研制的一种5 k W霍尔推力器LHT—140的性能,采用ANSOFT软件进行了磁场优化设计,将磁场径向分量的轴向梯度提高了47%,相同励磁激励下放电通道中的磁场强度提高了38%。建立了一个R-Z平面内的二维particle-in-cell(PIC)等离子体模型,对磁场优化后推力器的性能进行了仿真分析,预估其在300~800 V放电电压、10~15 mg/s流率范围内,推力提升了9.6%~22.1%,效率提升了8.7%~19.3%。性能验证试验表明磁场优化后在相同放电电压与流率下,性能提升的测试值高于仿真值。

In order to improve the performance of a 5 kW hall thruster developed by Lanzhou institute of physics,optimal design of magnetic field was conducted using ANSOFT software.The axial gradient of the radial component of the magnetic field was increased by 47%,and magnetic field intensity in the discharge channel under the same excitation was increased by 38%.A two-dimensional particle-in-cell(PIC)plasma model in the R-Z plane was built to simulate the optimized hall thruster.The simulation results show that the thrust is increased by 9.6%to 22.1%,and the efficiency is increased by 8.7%to19.3%after the magnetic field optimization.The performance test shows that the test value of the performance increase is higher than the simulation value under the same discharge voltage and propellant mass flow rate.