Relationship between Corona Discharge Thrust and Applied Voltage’s Polarity

Liang Gu (), Wei Tan, Juan He, Zheng Jiang, Xingang Chen, Wenfa Ren and Zhuangzhuang Jin
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Liang Gu: School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China
Wei Tan: School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China
Juan He: School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China
Zheng Jiang: State Grid Chongqing Electric Power Company Bishan Power Supply Branch, Chongqing 402760, China
Xingang Chen: School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China
Wenfa Ren: School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China
Zhuangzhuang Jin: School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China

Energies, 2023, vol. 16, issue 14, 1-11

Abstract: The thrust from corona discharge might be a promising propulsion technology in future aviation due to its advantage of not requiring mechanical moving parts. Although the thrust from corona discharge has been researched by many scholars, the effect of the applied voltage’s polarity on the thrust has received little attention. This polarity effect might be very important for some special electrohydrodynamic thrusters. This paper firstly built a test platform to reveal the effect of the applied voltage’s polarity on both the thrust and the corona current from a pair of symmetrically distributed needle electrodes. Then the applied voltage’s polarity on the electrical field distribution between a pair of needle-plate electrodes was simulated. Finally, the relationship between the space ions at the tip of the needle electrode and the thrust are discussed. The results show that a negative needle electrode with a smaller curvature radius has a stronger thrust than a positive one with a larger curvature radius, and a stronger thrust corresponds to a higher corona current. The local electric field is enhanced by the space ions at the tip of a negative needle electrode, while it is weakened by a positive needle electrode. This results in the polarity of thrust.

Keywords: needle electrode; corona discharge; thrust; polarity effect (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: 2023
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