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Spot and diffuse mode of cathode attachments in a magnetically rotating arc plasma generator at atmospheric pressure

文献类型：期刊论文

作者Wang, Cheng1; Sun, Qiang1; Sun, Lu1; Lu, Zhongshan1; Xia, Weiluo2; Xia, Weidong1
刊名JOURNAL OF APPLIED PHYSICS
出版日期2019-01-21
卷号125期号:3页码:15
ISSN号0021-8979
DOI10.1063/1.5081113
通讯作者Xia, Weidong(xiawd@ustc.edu.cn)
英文摘要Adjusting the strength of an axial magnetic field is an effective method to control the cathode attachment. In this paper, a magnetically rotating arc plasma generator is constructed to study the cathode attachment modes under different magnetic fields. Two cathode attachment modes are observed: a spot mode and a diffuse mode. Images of cathode attachments, temperature distribution of the cathode surface, and arc voltage characteristics correlating to different cathode attachment modes are investigated. Results show that the spot mode is favored by the low magnetic field. With an increase in the magnetic field, the cathode attachment region expands gradually, until the spot mode evolutes to the diffuse mode. The diffuse mode is associated with a significantly increased arc voltage, indicating that the transition is an abrupt process rather than a gradual process. For the diffuse mode, the cathode end has a higher average and lower peak temperature, but there exists varying temperature distribution on the cathode end, such as the ring-shaped high temperature region. Additionally, a two-dimensional coupled model is applied to qualitatively discuss the effect of magnetic field on the cathode attachment modes. Simulation results reveal that energy flux to the cathode surface increases with the increase of the magnetic field, and the major increment is thermal conduction heating from the arc column to the cathode surface, which possibly arises from the axial compression of arc plasma. Thus, the diffuse mode tends to always operate in the large magnetic field. Published under license by AIP Publishing.
WOS关键词HID ELECTRODE FALLS ; EROSION RATE ; SURFACE-TEMPERATURE ; BOUNDARY-LAYER ; DC ARC ; ARGON ; VELOCITY ; ROOTS
资助项目National Natural Science Foundation of China (NNSFC)[11705202] ; National Natural Science Foundation of China (NNSFC)[11475174] ; Anhui Provincial Natural Science Foundation[1808085MA12]
WOS研究方向Physics
语种英语
WOS记录号WOS:000456264400005
出版者AMER INST PHYSICS
资助机构National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; National Natural Science Foundation of China (NNSFC) ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation ; Anhui Provincial Natural Science Foundation
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/41534]  
专题合肥物质科学研究院_中科院等离子体物理研究所
通讯作者Xia, Weidong
作者单位1.Univ Sci & Technol, Dept Thermal Sci & Energy Engn, Hefei 230027, Anhui, Peoples R China
2.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Cheng,Sun, Qiang,Sun, Lu,et al. Spot and diffuse mode of cathode attachments in a magnetically rotating arc plasma generator at atmospheric pressure[J]. JOURNAL OF APPLIED PHYSICS,2019,125(3):15.
APA Wang, Cheng,Sun, Qiang,Sun, Lu,Lu, Zhongshan,Xia, Weiluo,&Xia, Weidong.(2019).Spot and diffuse mode of cathode attachments in a magnetically rotating arc plasma generator at atmospheric pressure.JOURNAL OF APPLIED PHYSICS,125(3),15.
MLA Wang, Cheng,et al."Spot and diffuse mode of cathode attachments in a magnetically rotating arc plasma generator at atmospheric pressure".JOURNAL OF APPLIED PHYSICS 125.3(2019):15.

入库方式： OAI收割

来源：合肥物质科学研究院

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