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Numerical Study of DC Argon Arc with Axial Magnetic Fields

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Abstract

Numerical simulation of an atmospheric DC arc under an axial magnetic field (AMF) is performed with a model of unifying the plasma and electrodes. In the model the configuration of the cathodic arc attachment is free. Results are given for a 200A argon arc under 0–0.02T AMF. The simulation results indicate that, with the AMF, the cathode arc attachment shrinks towards its tip. That induces many changes of arc configuration and arc parameters, different from the calculation assuming a fixed cathodic arc attachment: as the AMF increases, the plasma temperature nearby the cathode tip increases higher; the low temperature hollow of plasma nearby the anode expands more intensively in both axial and radial direction; the profile of current density on the anode exhibits a bigger concave shape; arc voltage drop increases more; and more power is delivered to the anode. The elements that cause the changes are discussed.

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Acknowledgments

The work is supported by The National Natural Science Foundation of China: NSFC11035005, NSFC50876101.

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Authors and Affiliations

  1. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 230027, China

    Tang Chen, Zhang Xiaoning, Bing Bai, Zimu Xu, Cheng Wang & Weidong Xia

  2. Full Dimension Power Tech. Co., Ltd, D Block 6th Floor of Gem Techcenter, No. 9 Shangdi 3rd Street, Haidian District, Beijing, 100085, China

    Bing Bai

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  1. Tang Chen
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  2. Zhang Xiaoning
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Correspondence to Weidong Xia.

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Chen, T., Xiaoning, Z., Bai, B. et al. Numerical Study of DC Argon Arc with Axial Magnetic Fields. Plasma Chem Plasma Process 35, 61–74 (2015). https://doi.org/10.1007/s11090-014-9592-7

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