Parametric Study on Arc Behavior of Magnetically Diffused Arc  

作　　者：陈瑭 李辉 白冰 廖梦然 夏维东 

机构地区：[1]Department of Thermal Science and Energy Engineering, University of Science and Technology of China [2]Full Dimension Power Tech.Co., Ltd

出　　处：《Plasma Science and Technology》2016年第1期6-11,共6页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11475174,11035005 and 50876101)

摘　　要：A model coupling the plasma with a cathode body is applied in the simulation of the diffuse state of a magnetically rotating arc.Four parametric studies are performed：on the external axial magnetic field（AMF）,on the cathode shape,on the total current and on the inlet gas velocity.The numerical results show that：the cathode attachment focuses in the center of the cathode tip with zero AMF and gradually shifts off the axis with the increase of AMF;a larger cathode conical angle corresponds to a cathode arc attachment farther away off axis;the maximum values of plasma temperature increase with the total current;the plasma column in front of the cathode tip expands more severely in the axial direction,with a higher inlet speed;the cathode arc attachment shrinks towards the tip as the inlet speed increases.The various results are supposed to be explained by the joint effect of coupled cathode surface heating and plasma rotating flow.A model coupling the plasma with a cathode body is applied in the simulation of the diffuse state of a magnetically rotating arc.Four parametric studies are performed：on the external axial magnetic field（AMF）,on the cathode shape,on the total current and on the inlet gas velocity.The numerical results show that：the cathode attachment focuses in the center of the cathode tip with zero AMF and gradually shifts off the axis with the increase of AMF;a larger cathode conical angle corresponds to a cathode arc attachment farther away off axis;the maximum values of plasma temperature increase with the total current;the plasma column in front of the cathode tip expands more severely in the axial direction,with a higher inlet speed;the cathode arc attachment shrinks towards the tip as the inlet speed increases.The various results are supposed to be explained by the joint effect of coupled cathode surface heating and plasma rotating flow.

关 键 词：arc modeling cathode arc attachment plasma configuration 

分 类 号：O53[理学—等离子体物理]