Simulation and Study of DC Corona Discharge Characteristics of Bar-Plate Gap

Na Feng (), Tiehua Ma, Changxin Chen, Boren Yao and Weitao Gao
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Na Feng: State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China
Tiehua Ma: State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China
Changxin Chen: State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China
Boren Yao: State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China
Weitao Gao: State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China

Energies, 2022, vol. 15, issue 17, 1-13

Abstract: In this paper, the corona discharge process of the bar-plate gap at −1 kV DC voltage is simulated using a two-dimensional axisymmetric plasma module. We analyze the variation of air negative corona discharge current, and the distribution morphology of microparticles in different discharge stages in detail. The significance of plasma chemical reactions at some typical time and the distribution characteristics of heavy particles are investigated according to reaction rates. Results show that, in the current rising stage, the collision ionization reactions (e.g., R 1 and R 2 ) and electron adsorption reaction (e.g., R 3 ) play a major role, which lead to the increase in charged particles and the formation of an electron avalanche. In the current drop stage, all reaction rates decreased, except for collision ionization and electron attachment, partial charge transfer reactions (e.g., R 8 , R 10 , R 11 , and R 14 ), and composite reactions (e.g., R 16 , R 17 , and R 18 ), which come into play and gradually reduce the number of charged ions in the gap. In the current stabilizing stage, the main chemical reactions are composite reactions (e.g., R 16 and R 17 ), then the corona discharge ends. For the heavy particle distribution, O 2 + and O 4 + are the main positive ions, O 2 − is the most abundant negative ions, and the neutral particles are mainly O.

Keywords: DC negative corona; air; bar-plate gap; plasma model; discharge morphology; heavy particles distribution (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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