典型文献
Numerical simulation of low-current vacuum arc jet considering anode evaporation in different axial magnetic fields
文献摘要：
As the main source of the vacuum arc plasma,cathode spots(CSs)play an important role on the behaviors of the vacuum arc.Their characteristics are affected by many factors,especially by the magnetic field.In this paper,the characteristics of the plasma jet from a single CS in vacuum arc under external axial magnetic field(AMF)are studied.A multi-species magneto-hydro-dynamic(MHD)model is established to describe the vacuum arc.The anode temperature is calculated by the anode activity model based on the energy flux obtained from the MHD model.The simulation results indicate that the external AMF has a significant effect on the characteristic of the plasma jet.When the external AMF is high enough,a bright spot appears on the anode surface.This is because with a higher AMF,the contraction of the diffused arc becomes more obvious,leading to a higher energy flux to the anode and thus a higher anode temperature.Then more secondary plasma can be generated near the anode,and the brightness of the'anode spot'increases.During this process,the arc appearance gradually changes from a cone to a dumbbell shape.In this condition,the arc is in the diffuse mode.The appearance of the plasma jet calculated in the model is consistent with the experimental results.
文献关键词：
中图分类号：
作者姓名：
Zhefeng ZHANG;Lijun WANG;Ze YANG;Ming LUO;Jiagang LI
作者机构：
State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Xi'an 710049,People's Republic of China
文献出处：
引用格式：
[1]Zhefeng ZHANG;Lijun WANG;Ze YANG;Ming LUO;Jiagang LI-.Numerical simulation of low-current vacuum arc jet considering anode evaporation in different axial magnetic fields)[J].等离子体科学和技术（英文版）,2022(04):13-20
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B类：
Numerical,simulation,low,current,vacuum,arc,jet,considering,anode,evaporation,different,axial,magnetic,fields,main,source,plasma,cathode,spots,CSs,play,important,role,behaviors,Their,characteristics,are,affected,by,many,factors,especially,In,this,paper,from,single,under,external,AMF,studied,multi,species,magneto,hydro,dynamic,MHD,model,established,describe,temperature,calculated,activity,energy,flux,obtained,results,indicate,that,has,significant,effect,When,enough,appears,surface,This,because,higher,contraction,diffused,becomes,more,obvious,leading,thus,Then,secondary,generated,near,brightness,increases,During,process,appearance,gradually,changes,cone,dumbbell,shape,condition,consistent,experimental
AB值：
0.473618
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