| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Computational investigation on dynamics of atmospheric pressure air discharge excited by a twin needle-plate electrode configuration |
| Chang-Shuo Lv(吕长硕)1, Wen Yan(晏雯)1,†, Zhen-Hua Bi(毕振华)1, Ying Song(宋颖)1, Jin-Hai Niu(牛金海)1, and De-Zhen Wang(王德真)2 |
1 Liaoning Key Laboratory of Plasma Technology, School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China;
2 School of Physics, Dalian University of Technology, Dalian 116024, China |
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Abstract The large-scale low temperature plasma produced by atmospheric pressure discharge utilizing an array needle-plate electrode design has promising future applications in a variety of industries. Improving the scale and uniformity of plasma requires a thorough investigation of the interactions between needle discharges. For that purpose, a two-dimensional (2D) computational analysis of the interaction of two concurrently propagating air discharges created by a twin needle-plate electrode design is presented in the paper. Investigations are also conducted on the effect of needle spacing, pulsed peak voltage, and pulse polarity. Immediately after ignition, two identical discharges move in the same direction toward the plane electrode. The propagation route is a curve with tight needle-to-needle spacing, which is ascribed to competition between electrostatic repulsion and photoionization-induced attraction. Larger needle spacing, higher peak voltage, or negative polarity all can increase the plasma area on the plate electrode. Additionally, reducing the distance between needles or raising the pulsed peak voltage is an effective way to improve the spatial homogeneity of the discharge array. Positive voltage pulses cause a more homogeneous discharge than negative voltage pulses.
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Received: 19 August 2025
Revised: 28 October 2025
Accepted manuscript online: 07 November 2025
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PACS:
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51.50.+v
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(Electrical properties)
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52.25.-b
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(Plasma properties)
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52.40.-w
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(Plasma interactions (nonlaser))
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52.65.Kj
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(Magnetohydrodynamic and fluid equation)
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| Fund: Project supported by National Natural Science Foundation of China (Grant No. 11705022 and 12375198), the Liaoning Provincial Science and Technology Program (Grant Nos. 2024JH/102600109 and 2023JH2/101700307), and the National College Students Innovation and Entrepreneurship Training Program (Grant No. 202512026068). |
Corresponding Authors:
Wen Yan
E-mail: yanwen@dlnu.edu.cn
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Cite this article:
Chang-Shuo Lv(吕长硕), Wen Yan(晏雯), Zhen-Hua Bi(毕振华), Ying Song(宋颖), Jin-Hai Niu(牛金海), and De-Zhen Wang(王德真) Computational investigation on dynamics of atmospheric pressure air discharge excited by a twin needle-plate electrode configuration 2026 Chin. Phys. B 35 075101
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