| 电荷交换离子对栅极系统束流影响的数值研究 |
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| 引用本文： | 钟凌伟,刘宇,王海兴,汤海滨,任军学.电荷交换离子对栅极系统束流影响的数值研究[J].航空动力学报,2009,24(8):1911-1916. |
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| 作者姓名： | 钟凌伟 刘宇 王海兴 汤海滨 任军学 |
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| 作者单位： | 北京航空航天大学宇航学院; |
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| 基金项目： | 真空低温技术与物理国家级重点实验室基金(9140C5504020704);;国家自然科学基金(10805004) |
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| 摘 要： | 采用二维网格质点法(PIC)计算离子在离子发动机栅极系统中的运动,通过在模型中添加离子和中性粒子电荷交换的Monte Carlo碰撞模块,得到了电荷交换离子在栅极周围的分布及电荷交换离子的运动规律.计算结果表明:考虑电荷交换离子后,屏栅极电流较不考虑电荷交换离子情况时增大了1.42%,所受影响不大,加速栅极电流由0增大到主束流电流的1.41%.模拟结果表明:加速栅极下游较远处产生的电荷交换离子,是造成加速栅极下游面腐蚀及加速栅极电流的主要原因.
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| 关 键 词： | ion thruster optical system charge exchange（CEX） ions particle-in-cell（PIC） Monte Carlo collision（MCC） |
| 收稿时间： | 2008/11/18 0:00:00 |
| 修稿时间： | 3/30/2009 1:02:12 PM |
Numerical study the influences of charge exchange ions on optical system ion beam |
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| ZHONG Ling-wei,LIU Yu,WANG Hai-xing,TANG Hai-bin and REN Jun-xue.Numerical study the influences of charge exchange ions on optical system ion beam[J].Journal of Aerospace Power,2009,24(8):1911-1916. |
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| Authors: | ZHONG Ling-wei LIU Yu WANG Hai-xing TANG Hai-bin and REN Jun-xue |
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| Institution: | School of Astronautics;Beijing University of Aeronautics and Astronautics;Beijing 100191;China |
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| Abstract: | Based on particle-in-cell(PIC) and Monte Carlo collision(MCC) method,a two-dimensional numerical model was adopted to investigate the distribution and kinetic characteristics of the charge exchange(CEX) ions in the optical system of ion thruster.The simulation results show that,the screen grid current is increased by 1.42 percent when the CEX ions are considered.On the other hand,the accelerator grid current increases from zero to 1.41 percent of the main beam current.It is indicated from the simulation res... |
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| Keywords: | ion thruster optical system charge exchange (CEX) ions particle-in-cell (PIC) Monte Carlo collision (MCC) |
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