首页|空心阴极羽流等离子体放电不稳定性二维仿真模型

空心阴极羽流等离子体放电不稳定性二维仿真模型

扫码查看
原文链接
  • 万方数据
  • 维普
空心阴极放电过程中空间电势振荡会影响其工作性能，振荡过程产生的高能离子会对阴极孔产生溅射腐蚀，进而严重影响空心阴极的使用寿命。建立由质点网格(Particle-in-Cell，PIC)模型、振荡幅值模型与等效电路模型组成的一体化耦合模型来计算空心阴极放电过程电势振荡特性。采用PIC模型计算不同放电电流、放电电压及气体流量下羽流等离子体放电特性，获得羽流的电势、等离子数密度、电场强度和电子温度等时均参数的空间分布。基于等离子体聚集与耗散理论，建立电势振荡幅值模型，根据计算得到的时均参数来预估空间电势振荡幅值。将等离子体时均参数以及电势幅值振荡参数作为输入参数，代入到空心阴极放电等效电路模型中，从而得到相应工况下的电势振荡波形图。通过和实验结果对比发现，所建立的一体化耦合模型能较好地预估空心阴极羽流等离子体电势振荡特性，研究成果可用于指导空心阴极稳定放电，提升空心阴极在轨工作时限。
Research on Two-dimensional Simulation Model of Discharge Instability of Hollow Cathode Plume Plasma
In the process of hollow cathode discharge,the space potential oscillation affects its working performance,and the high-energy ions generated in the oscillation process cause sputtering corrosion to the cathode orifice,which seriously affect the lifetime of hollow cathode. In this paper,an integrated coupling model consisting of prticle-in-cell ( PIC ) model,oscillation amplitude model and equivalent circuit model is established to calculate the potential oscillation characteristics of hollow cathode. Firstly,PIC model is used to calculate the discharge characteristics of plume plasma under the conditions of different discharge currents,discharge voltages and gas flow rates,and the spatial plasma distribution of time-averaged parameters such as plume potential,plasma number density,electric field strength and electron temperature is obtained. Secondly,based on the plasma aggregation and dissipation theory,the potential oscillation amplitude model is established,and the spatial potential oscillation amplitude is estimated according to the calculated time-averaged parameters. Finally,the plasma time-averaged parameters and potential amplitude oscillation parameters are taken as input parameters and brought into the hollow cathode discharge equivalent circuit model to obtain the potential oscillation waveform under the corresponding working conditions. By comparing with the experimental results,it is found that the integrated coupling model established in this paper can predict the plasma potential oscillation of hollow cathode plume,and the research results can be used to guide the stable discharge of hollow cathode,thus improving its service lifetime.

hollow cathodeprticle-in-cell modelpotential oscillationequivalent circuit modelplasma aggregation and dissipation

田丰、苗龙、梁福文、宋家辉、何梓豪、武志文、王宁飞

展开 >

北京理工大学 宇航学院,北京100081

空心阴极 质点网格模型 电势振荡 等效电路模型 等离子体聚集与耗散

国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金中国博士后科学基金中国博士后科学基金

2021YFC22028002020YFC220110052177128522024602023TQ00312021TQ0036

2024

10.12382/bgxb.2022.0946

兵工学报
中国兵工学会

兵工学报

CSTPCD北大核心
影响因子：0.735
ISSN：1000-1093
年,卷(期)：2024.45(4)
  • 27