Numerical simulation of perveance impingement current for ion thruster

Journal of Propulsion Technology ›› 2011, Vol. 32 ›› Issue (6): 751-755.

Science and Technology on Vacuum and Cryogenics Technology and Physics Laboratory, Lanzhou Institute of Physics, Lanzhou 730000, China;Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China

Published:2021-08-15

离子推力器欠聚焦冲击电流的数值模拟

李娟,刘洋,楚豫川,曹勇

兰州空间技术物理研究所真空低温技术与物理重点实验室,甘肃兰州 730000;哈尔滨工业大学深圳研究生院,广东深圳 518055;哈尔滨工业大学深圳研究生院,广东深圳 518055;哈尔滨工业大学深圳研究生院,广东深圳 518055

作者简介:李娟(1979—),女,硕士,工程师,研究领域为空间电推进技术。E-mail:leejuan.lip@foxmail.com
基金资助:
真空低温技术与物理重点实验室基金(9140C5504050902)；国家自然科学基金(10875034)。

Abstract

Abstract: The ion extraction process is a critical physical process in the ion thruster. It directly affects the thrust, specific impulse and efficiency, etc. Based on Immersed Finite Element Particle-In-Cell (IFE-PIC) method, a three dimensional numerical model is adopted to investigate the plasma flow in an ion optics system of ion thruster. The simulation results reveal the electrostatic field distribution, ion density distribution and impingement current on the accelerator grid of the optical system. It is shown that impingement current on the accelerator grid increases when ion density of discharge chamber increases.

Key words: Ion thruster; Optical system; Impingement current; Perveance

摘要： 离子光学系统的离子束引出过程是离子推力器重要的物理过程,该过程直接关系到推力器的推力、比冲、效率等参数。为研究离子在离子推力器光学系统中的运动特性,使用了基于IFE-PIC(Immersed Finite Element Particle-In-Cell)的离子推力器光学系统离子束引出过程的三维数值计算模型,计算了栅极间电场分布、电荷密度,栅极冲击电流及欠聚焦极限。计算结果表明,当屏栅极电压不同时,发生欠聚焦的等离子束电流也不同。在欠聚焦工况下,一部分离子与栅极碰撞,产生冲击电流。冲击电流随电离室等离子体数密度增加而增大。

关键词: 离子推力器;光学系统;冲击电流;欠聚焦

李娟,刘洋,楚豫川,曹勇. 离子推力器欠聚焦冲击电流的数值模拟[J]. 推进技术, 2011, 32(6): 751-755.

References

[2] Peng X, Ruyten W, Friedly V, et al.Particle simulation of ion optics and grid erosion for two-grid and three-grid systems[J].Review of Scientific Instruments, 4,5(5):1770-1773.
[3] Arakawa Y,Nakano M.An efficient three-dimensional optics code for ion thruster research [R].AIAA 96-3198.
[4] Muravlev V A,Shagayda A A.Numerical modeling of extraction systems in ion thrusters[R].IEPC 99-162.
[5] Boyd I D,Crofton M W.A computational study of grid erosion through ion impact[R].AIAA 2000-3664.
[6] Wang J, Polk J, Brophy J, et al.3-D particle simulations of NSTAR ion optics[R].IEPC 2001-085.
[7] Wang J, Brieda L,Kafafy R.The development of an IFE-PIC simulation model for plume spacecraft interactions [R].AIAA 2003-4874.
[8] Wang J,Lin T.An immersed finite element electric field solver for ion optics modeling[R].AIAA 2002-4263.
[9] Farnell C.Numerical simulation of HiPEP ion optics[R].AIAA 2004-3818.
[10] Mori K, Komurasaki K,Arakawa Y.Nozzle scale optimum for the impulse generation in a laser pulsejet[J].Journal of Spacecraft and Rockets, 4,1(5):887-889.
[11] 唐志平,龚平,胡晓军,等.大气吸气模式激光推进的实验研究[J].航空学报,5,6(1):13-17.
[12] 许仁萍,唐志平.大气模式下多脉冲激光推进的数值模拟[J].强激光与粒子束,7,9(3):370-372.
[13] Cao Zhengrui, Hong Yanji,Wen Ming.Effects of conical nozzle configuration on impulse coupling coefficient in repetitively-pulsed laser propulsion[J].Optoelectrinics Letters, 9,5(3):190-193.
[14] 李倩,文明,曹正蕊,等.吸气式激光推进推力产生机理的数值模拟[J].爆炸与冲击,6,6(6):550-555.
[15] Junling Song, Yanji Hong, Ming Wen, et al.Numerical analysis of laser repetition rate and pulse numbers in multi-pulsed laser propulsion[C].Germany:7th International Symposium on Beamed Energy Propulsion,2011.
[16] 郑义军,谭荣清,王东蕾,等.激光脉冲重复频率对冲量耦合系数的影响研究[J].强激光与粒子束,5,7(7):979-982.