多级会切场推力器振荡特性模拟研究
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摘要
目前多级会切场推力器(High Efficiency Multi-Plasma Thruster,HEMPT)数值模拟研究采用的主要手段是全粒子(Paticle In Cell,PIC)模拟方法,但是这种全粒子模拟对计算机的要求较高,因此文章通过建立HEMPT的一维流体模型,再现HEMPT的振荡现象,对放电电流和等离子体参数之间的关联性及等离子体参数分布规律进行研究。沿着两条典型的电子传导路径,利用MATLAB中Simulink模块建立一维流体模型。结果分析表明,推力器内部等离子体参数的振荡周期与放电电流振荡周期一致。推力器的主电离区在两个磁尖端之间,电势降主要集中在出口附近。
Now the main numerical simulation method of high efficiency multi plasma thruster(HEMPT)is particle in cell.But this method puts higher demands on computer.Therefore,this method aims at reappearing the oscillation phenomenon in high efficiency multi-plasma thruster by building up one dimension fluid model and studying the plasma parameters distribution and the relationship between the current and plasma parameters.A one dimension fluid model was built up along two distinguishing typical electron paths in thrusters by Simulink.The simulation results show that the plasma parameters oscillation period is consistent with that of the current.The main ionization zone is between the two cusped fields.The main area where potential drops is near the channel exit.
Now the main numerical simulation method of high efficiency multi plasma thruster(HEMPT)is particle in cell.But this method puts higher demands on computer.Therefore,this method aims at reappearing the oscillation phenomenon in high efficiency multi-plasma thruster by building up one dimension fluid model and studying the plasma parameters distribution and the relationship between the current and plasma parameters.A one dimension fluid model was built up along two distinguishing typical electron paths in thrusters by Simulink.The simulation results show that the plasma parameters oscillation period is consistent with that of the current.The main ionization zone is between the two cusped fields.The main area where potential drops is near the channel exit.
引文
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[12]HARA K,SEKERAK M J,BOYD I D,et al.Mode transition of a Hall thruster discharge plasma[J].Journal of Applied Physics,2014,115(20):203304-2033010.
[13]LIU H,WU H,ZHAO Y,et al.Study of the electric field formation in a multi-cusped magnetic field[J].Physics of Plasmas,2014,21(9):214.
[14]MOROZOV A I,SAVEL′EV V V.One-dimensional hydrodynamic model of the atom and ion dynamics in a stationary plasma thruster[J].Plasma Physics Reports,2000,26(3):219-224.
[15]MOROZOV A I,SAVEL′EV V V.One-dimensional hybrid model of a stationary plasma thruster[J].Plasma Physics Reports,2000,26(10):875-880.
[16]FIFE J M.Hybrid-PIC modeling and electrostatic probe survey of Hall thrusters[D].Massachusetts:Massachusetts Institute of Technology,1998:189-195.
[17]BARRAL S,AHEDO E.Theoretical study of the breathing mode in Hall thrusters[C]∥42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference&Exhibit,Scacramento,California,July 9-12,2006:5172.
[2]GENOVESE A,LAZURENKO A,KOCH N,et al.Endurance testing of HEMPT-based ion propulsion modules for small GEO[C].32nd International Electric Propulsion Conference,Wiesbaden,Germany:IEPC,2011:15.
[3]MATYASH K,SCHNEIDER R,MUTZKE A,et al.Kinetic simulations of SPT and HEMP thrusters including the near-field plume region[J].IEEE Transactions on Plasma Science,2009,38(9):2274-2280.
[4]BRANDT T,TROTTENBERG T,GROLL R,et al.Particle-in-cell simulation of the plasma properties and ion acceleration of a down-scaled HEMP-Thruster[C].30th International Spacecraft Propulsion Conference,Cologne,Germany:ISPC,2014.
[5]BOEUF J P,GARRIGUES L.Low frequency oscillations in a stationary plasma thruster[J].Journal of Applied Physics,1998,84(7):3541-3554.
[6]胡俊锋,刘辉,李建置,等.会切磁场推力器低频振荡特性[J].中国空间科学技术,2016,36(1):26-34.HU J F,LIU H,LI J Z,et al.Low frequency oscillation characteristics in a cusped field thruster[J].Chinese Space Science and Technology,2016,36(1):26-34(in Chinese).
[7]MOROZOV A I,SAVEL′EV V V.One-dimensional hybrid model of a stationary plasma thruster[J].Plasma Physics Reports,2000,26(10):875-880.
[8]MOROZOV A I,SAVEL′EV V V.One-dimensional hydrody-namic model of the atom and ion dynamics in a stationary plasma thruster[J].Plasma Physics Reports,2000,26(3):219-224.
[9]BARRAL S,AHEDO E.Theoretical study of the breathing mode in Hall thrusters[C]∥42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference,Scacramento,California,July 9-12,2006.
[10]BARRAL S,AHEDO E.Low-frequency model of breathing oscillations in Hall discharges[J].Physical Review E,2009,79(4):046401.
[11]HARA K,BOYD I D,KOLOBOV V I.One-dimensional hybrid-direct kinetic simulation of the discharge plasma in a Hall thruster[J].Physics of Plasmas,2012,19(11):530-541.
[12]HARA K,SEKERAK M J,BOYD I D,et al.Mode transition of a Hall thruster discharge plasma[J].Journal of Applied Physics,2014,115(20):203304-2033010.
[13]LIU H,WU H,ZHAO Y,et al.Study of the electric field formation in a multi-cusped magnetic field[J].Physics of Plasmas,2014,21(9):214.
[14]MOROZOV A I,SAVEL′EV V V.One-dimensional hydrodynamic model of the atom and ion dynamics in a stationary plasma thruster[J].Plasma Physics Reports,2000,26(3):219-224.
[15]MOROZOV A I,SAVEL′EV V V.One-dimensional hybrid model of a stationary plasma thruster[J].Plasma Physics Reports,2000,26(10):875-880.
[16]FIFE J M.Hybrid-PIC modeling and electrostatic probe survey of Hall thrusters[D].Massachusetts:Massachusetts Institute of Technology,1998:189-195.
[17]BARRAL S,AHEDO E.Theoretical study of the breathing mode in Hall thrusters[C]∥42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference&Exhibit,Scacramento,California,July 9-12,2006:5172.