霍尔推力器不同壁面侵蚀对低频振荡特性影响研究  

Effects of Different Wall Erosion on Low Frequency Oscillation Characteristics of Hall Thruster

作　　者：韩轲[1] 汪颖 鲁海峰 HAN Ke;WANG Ying;LU Hai-feng(School of Computer and Information Engineering,Harbin University of Commerce,Harbin 150028,China;School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨商业大学计算机与信息工程学院,黑龙江哈尔滨150028 [2]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《推进技术》2020年第6期1434-1440,共7页Journal of Propulsion Technology

基　　金：国家自然科学基金(51477035);黑龙江省自然科学基金(E201452)。

摘　　要：基于霍尔推力器一维准中性流体模型,对放电壁面侵蚀对低频振荡特性的影响进行了数值模拟研究。通过改变霍尔推力器放电通道的横截面积,研究了霍尔推力器寿命期内通道受离子溅射后,放电电流振荡特性变化。研究结果显示,横截面积从25cm2增大到37cm2时,放电电流振荡幅值增加,振荡频率基本不变;继续增加横截面积,放电电流振荡幅值减小,振荡频率增加。理论分析表明:通道侵蚀面积增大,导致离子碰撞频率变化,进而引起振荡特性变化。Numerical simulation study on the effects of discharge wall erosion on low frequency oscillation characteristics was carried out based on a one-dimensional quasi-neutral fluid model of a Hall thruster.The oscillation characteristics of discharge current in a Hall thruster was studied after ion sputtering in the channel during its lifetime by changing the cross-sectional area of the discharge channel.The results show that when the cross-sectional area increases from 25cm2 to 37cm2,the oscillation amplitude of discharge current increases and the oscillation frequency almost remains unchanged.If the cross-sectional area continues to increase,the oscillation amplitude of discharge current decreases and the oscillation frequency increases.Theoretical analysis shows that the increase of channel erosion area will lead to the change of ion collision frequency,which will further lead to the change of oscillation characteristics.

关 键 词：霍尔推力器 横截面积 低频振荡 壁面侵蚀 一维准中性流体模型 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程]