Detailed Numerical Simulation of Cathode Spots in High-Current Vacuum Arcs

被引：0
|
作者：
Kaufmann, H. T. C. [1 ,2 ]
Cunha, M. D. [1 ,2 ]
Benilov, M. S. [1 ,2 ]
Hartmann, W. [3 ]
Wenzel, N. [3 ]
机构：
[1] Univ Madeira, Dept Fis, FCEE, P-9000 Funchal, Portugal
[2] Univ Lisbon, IST, Inst Plasmas & Fusao Nucl, P-1699 Lisbon, Portugal
[3] Siemens AG, Corp Technol, Gunther Scharowsky Str 1, D-91058 Erlangen, Germany
来源：
2016 27TH INTERNATIONAL SYMPOSIUM ON DISCHARGES AND ELECTRICAL INSULATION IN VACUUM (ISDEIV), VOL 2 | 2016年
关键词：
MECHANISM;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A detailed numerical model of cathode spots in high-current vacuum arcs is given. The model provides a complete description of all phases of life of an individual spot taking into account the presence of metal vapor left over from a previous explosion, the interaction of the vaporized plasma from the cathode spot with the cathode surface, and Joule heat generation in the cathode body. Melting and motion of molten metal due to Lorentz force are also accounted for, together with surface tension effects and the pressure exerted by the plasma over the cathode surface. First results are presented and analyzed for copper cathodes with a protrusion and planar cathodes. Emphasis is given to the investigation of the effect of the vaporized plasma and of hydrodynamic processes. No thermal runaway is observed.
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页数：4
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