Dynamic characteristics of multi-arc thermal plasma in four types of electrode configurations

作     者：Yanjun ZHAO Guohua NI Wei LIU Hongmei SUN Siyuan SUI Dongdong LI Huan ZHENG Zhongyang MA Chi ZHANG 赵彦君;倪国华;刘卫;孙红梅;隋思源;李冬冬;郑瓛;马中洋;张弛

作者机构：Institute of Plasma PhysicsChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of ChinaHefei 230026People’s Republic of China Anhui Province Key Laboratory of Medical Physics and TechnologyHefei 230031People’s Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2022年第24卷第5期

页      面：183-194页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China(No.11875295) the National Key R&D Program of China(No.2019YFC0119000) 

主　　题：multi-arc electrode configuration dynamic character erosion 

摘      要：The enhanced volume of thermal plasma is produced by a multi-arc thermal plasma generator with three pairs of discharge electrodes driven by three directed current power *** with a high-speed camera and an oscilloscope,which acquire optical and electric signals synchronously,the dynamic behavior of different kinds of multi-arc discharge adjusted by the electrode arrangement is ***,the spatial distributions and instability of the arc discharge are analyzed in four electrode configurations using the gray value statistical *** is found that the cathodic arcs mainly show a contracting state,while the anodic arcs have a trend of transition from shrinkage to a diffusion-like state with the increase of the discharge *** a result of the adjustment of the electrode configuration,a high temperature region formed in the center of the discharge region in configurations of adjacent electrodes with opposite flow distribution and opposite electrodes with swirl flow distribution due to severe fluctuation of *** discharge voltage rises with increased discharge current in this novel multi-arc plasma *** is also found that anode ablation mainly occurs on the conical surface at the copper electrode tip,while cathode erosion mainly occurs on the surface of the inserted tungsten and the nearby copper.