4.6 Article

Caudal autotomy and regeneration of arc in a 3D gliding arc discharge plasma

期刊

出版社

IOP Publishing Ltd
DOI: 10.1088/1361-6463/abfe3a

关键词

non-thermal plasma; gliding arc discharge; spatio-temporal evolution; arc root

资金

  1. National Natural Science Foundation of China [11975069]
  2. Fundamental Research Funds for the Central Universities [DUT20GJ211]

向作者/读者索取更多资源

Through analyzing the spatio-temporal evolution of GAD, a new mechanism governing arc evolution in 3D GAD was revealed. Different from traditional GAD, the PE arc continuously glides while the GE arc jumps, shedding the caudal part and generating a new arc tail simultaneously.
To gain a better understanding of the mechanism governing arc dynamics in 3D gliding arc discharge (GAD) plasma, the spatio-temporal evolution of GAD was investigated in a reverse vortex flow by a novel reactor with ring (powered electrode, PE) and truncated cone (ground electrode, GE) electrodes. A newly underlying mechanism governing arc evolution in 3D GAD was gained with combination of flow field simulation, synchronous electrical characteristics, intensified charge coupled device images and high-speed photos. The spatio-temporal analysis indicates that, being different from the well-known ignition-gliding-extinction mechanism occurring in traditional GAD, the PE arc root glides continuously in the 3D GAD, but the GE arc root features jumps from the end of the gliding path to the beginning of the next one. By means of the jumping, the arc auto-sheds the caudal part of the arc and a new arc tail is simultaneously generated, rather than rebuilding a new arc channel back to the shortest electrode gap. With this special behavior of caudal autotomy and regeneration, the main part of the arc remains for each jump. This new insight improves the understanding of the discharge mechanism governing arc evolution in 3D GAD and provides a reference for optimization design of gliding arc plasma in a vortex flow.

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