PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Characteristics of non-thermal AC arcs in multi-arc generator |
Qifu Lin(林启富)1,2, Yanjun Zhao(赵彦君)1,2, Wenxue Duan(段文学)1, Guohua Ni(倪国华)1,3, Xinyue Jin(靳兴月)1,2,3, Siyuan Sui(隋思源)1,2, Hongbing Xie(谢洪兵)1, Yuedong Meng(孟月东)1 |
1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China; 3 AnHui Province Key Laboratory of Medical Physics and Technology, Hefei 230031, China |
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Abstract To obtain large-volume non-thermal arc plasma (NTAP), a multiple NTAP generator with three pairs of electrodes has been developed. The arc plasma characteristics, including dynamic process, spatial distribution, and rotation velocity in the discharge zone, were investigated by high speed photograph and image processing methods. The results showed that the dynamic behaviors and spatial distribution of the arc plasma were strongly related to the electrode configuration. A swirl flow of multi-arc plasma was formed by adjusting the electrode configuration, and a steady luminance area was clearly observed in the center of the discharge zone. Moreover, the size of the luminance area increased by decreasing the gas flow rate. The electrical connection in series could be formed between/among these arc columns with their respective driving power supplies in the multi-arc dynamic evolution process. An approximately periodical process of acceleration and deceleration of the arc rotation velocity was observed in the multi-arc generator with swirl flow configuration. In general, the mean velocity of arc rotation was higher in the multi-arc generator with swirl flow configuration when a pair of electrodes driven by a power supply were opposite to each other rather than adjacent.
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Received: 05 August 2019
Revised: 06 November 2019
Accepted manuscript online:
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PACS:
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52.80.Mg
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(Arcs; sparks; lightning; atmospheric electricity)
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52.70.-m
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(Plasma diagnostic techniques and instrumentation)
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52.50.Dg
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(Plasma sources)
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52.30.-q
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(Plasma dynamics and flow)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11875295 and 11535003), Provincial Science and Technology Major Project of Anhui Province, China (Grant No. 17030801035), and Key Program of 13th Five-year Plan, CASHIPS, China (Grant No. KP-2017-25). |
Corresponding Authors:
Guohua Ni
E-mail: ghni@ipp.ac.cn
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Cite this article:
Qifu Lin(林启富), Yanjun Zhao(赵彦君), Wenxue Duan(段文学), Guohua Ni(倪国华), Xinyue Jin(靳兴月), Siyuan Sui(隋思源), Hongbing Xie(谢洪兵), Yuedong Meng(孟月东) Characteristics of non-thermal AC arcs in multi-arc generator 2019 Chin. Phys. B 28 125205
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