Square grid pattern with direction-selective surface discharges in dielectric barrier discharge

Jianhua ZHANG; Yuyang PAN; Jianyu FENG; Yunan HE; Jiahui CHU; Lifang DONG

doi:10.1088/2058-6272/ac9027

Plasma Science and Technology > 2023 > 25(2): 025406. > DOI: 10.1088/2058-6272/ac9027

Jianhua ZHANG, Yuyang PAN, Jianyu FENG, Yunan HE, Jiahui CHU, Lifang DONG. Square grid pattern with direction-selective surface discharges in dielectric barrier discharge[J]. Plasma Science and Technology, 2023, 25(2): 025406. DOI: 10.1088/2058-6272/ac9027

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Square grid pattern with direction-selective surface discharges in dielectric barrier discharge

1.
College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
2.
College of Quality and Technical Supervision, Hebei University, Baoding 071002, People's Republic of China

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Corresponding author:
Yuyang PAN, E-mail: pyy1616@163.com

Lifang DONG, E-mail: Donglf@hbu.edu.cn
Received Date: June 09, 2022
Revised Date: August 30, 2022
Accepted Date: September 06, 2022
Available Online: December 05, 2023
Published Date: January 05, 2023

Graphical Abstract

Abstract

Abstract

A new phenomenon that a filament discharged only once instead of twice in a cycle of the applied voltage is observed in a square grid pattern in a dielectric barrier discharge (DBD) with a larger gas gap, which is named intermittent discharge. Its spatiotemporal dynamics and the formation mechanism are studied by the multiple photomultiplier tubes and an intensified charge-coupled device. Corresponding to the positions of spots in the picture with an exposure time of 40 ms, there are some bright spots (discharge spots) and black spots (non-discharged spots) in the instantaneous image with an exposure time of 10 μs (a half cycle of the applied voltage). There are at least two bright spots around one black spot and vice versa. The surface discharges (SD_S) can be observed between any two adjacent spots. The intensity of the SD_S between the bright spot and the black spot is 2.5 times greater than that between two adjacent bright spots, which indicates that the SD_S are directional-selective. The intermittent discharge with positive (negative) current polarity changes to that with negative (positive) current polarity, after it sustains up to 14 voltage cycles at the longest. The spatial distribution of the electric field component is calculated through COMSOL software to solve the Poisson equation numerically. It is found that the inhomogeneous distribution of surface electric field is caused by the inhomogeneous distribution of wall charges, which leads to direction-selective SD_S. The intermittent discharge is formed by the competition between the direction-selective SD_S and volume discharges (VD_S) in DBD. This is the reason why the intermittent discharge is generated.
- dielectric barrier discharge,
- pattern,
- direction-selective surface discharges,
- intermittent discharge

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Acknowledgments

This work is supported by National Natural Science Foundation of China (No. 12075075). The Natural Science Foundation of Hebei Province, China (Nos. 2020201016 and A2018201154).

References (36)

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