Parametric Study on Arc Behavior of Magnetically Diffused Arc

CHEN Tang (陈瑭); LI Hui (李辉); BAI Bing (白冰); LIAO Mengran (廖梦然); XIA Weidong (夏维东)

doi:10.1088/1009-0630/18/1/02

Plasma Science and Technology > 2016 > 18(1): 6-11. > DOI: 10.1088/1009-0630/18/1/02

CHEN Tang (陈瑭), LI Hui (李辉), BAI Bing (白冰), LIAO Mengran (廖梦然), XIA Weidong (夏维东). Parametric Study on Arc Behavior of Magnetically Diffused Arc[J]. Plasma Science and Technology, 2016, 18(1): 6-11. DOI: 10.1088/1009-0630/18/1/02

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Parametric Study on Arc Behavior of Magnetically Diffused Arc

1Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China 2Full Dimension Power Tech. Co., Ltd, Beijing 100085, China

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

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Received Date: July 02, 2015

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Abstract

Abstract

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 e?ect of coupled cathode surface heating and plasma rotating flow.
- arc modeling,
- cathode arc attachment,
- plasma configuration

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References

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