期刊论文

Effects of Different Ambient Temperature on Ion Erosion Rate for Triple Grid of 30cm Diameter Ion Thruster

中文

推进技术

1001-4055

2020

41

1

121-131

10.13675/j.cnki.tjjs.180759

国家自然科学基金青年科学基金（61901202）；

本校为第一机构

为了对不同环境温度造成的30cm离子推力器三栅极组件离子刻蚀速率的影响进行分析,采用有限元仿真与试验验证相结合的方法,计算并试验验证了不同环境温度下的三栅极组件热平衡温度以及栅极间的相对位移变化,采用流体方法模拟了不同环境温度(20℃,-70℃,-120℃和-170℃)对三栅极组件的刻蚀影响,并结合短期寿命试验结果进行验证。结果显示:随着环境温度的降低,屏栅达到温度平衡的时间无变化,而加速栅温度平衡所需的时间则明显延长,20℃下的屏栅和加速栅热仿真结果与室温下推力器热平衡试验结果比对误差分别为7%和5%;其次环境温度的降低,会导致屏栅与加速栅的中心间距和边缘间距均缩小,而加速栅和减...

In order to obtain the effects of different ambient temperature on the ion erosion rate for the triple grid of a 30cm diameter ion thruster,FEM(finite element method)simulation and test verification are used to obtain the temperature distribution and thermal deformation under thermal equilibrium. Meanwhile,fluid simulation method is used to simulate erosion of the triple grid in different ambient temperature(20℃,-70℃,-120℃,-170℃)and verified by short life time test. The results show that the time for the screen grid to reach temperature equ...