Surface charge characteristics in a three-electrode surface dielectric barrier discharge

Jingwen FAN; Huijie YAN; Ting LI; Yurong MAO; Jiaqi LI; Jian SONG

doi:10.1088/2058-6272/ad7821

Plasma Science and Technology > 2024 > 26(11): 115403. > DOI: 10.1088/2058-6272/ad7821

Jingwen FAN, Huijie YAN, Ting LI, Yurong MAO, Jiaqi LI, Jian SONG. Surface charge characteristics in a three-electrode surface dielectric barrier discharge[J]. Plasma Science and Technology, 2024, 26(11): 115403. DOI: 10.1088/2058-6272/ad7821

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Surface charge characteristics in a three-electrode surface dielectric barrier discharge

Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Dalian University of Technology), Ministry of Education, School of Physics, Dalian 116024, People’s Republic of China

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Author Bio:
Huijie YAN: yanhuijie@dlut.edu.cn
Corresponding author:
Huijie YAN, yanhuijie@dlut.edu.cn
Received Date: March 11, 2024
Revised Date: September 01, 2024
Accepted Date: September 06, 2024
Available Online: September 07, 2024
Published Date: October 01, 2024

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Abstract

Abstract

The surface charge characteristics in a three-electrode surface dielectric barrier discharge (SDBD) are experimentally investigated based on the Pockels effect of an electro-optical crystal. The actuator is based on the most commonly used SDBD structure for airflow control, with an exposed electrode supplied with sinusoidal AC high voltage, a grounded encapsulated electrode and an additional exposed electrode downstream supplied with DC voltage. The ionic wind velocity and thrust can be significantly improved by increasing DC voltage although the plasma discharge characteristics are virtually unaffected. It is found that the negative charges generated by the discharge of the three-electrode structure accumulate on the dielectric surface significantly further downstream in an AC period compared to the actuator with a two-electrode structure. The negative charges in the downstream region increase as the DC voltage increases. In addition, the DC voltage affects the time required for the positive charge filaments to decay. The positive DC voltage expands the ionic acceleration zone downstream to produce a greater EHD force. The amplitude of the DC voltage affects the electric field on the dielectric surface and is therefore a key factor in the formation of the EHD force. Further research on the surface charge characteristics of a three-electrode structure has been conducted using a pulse power to drive the discharge, and the same conclusions are drawn. This work demonstrates a link between surface charge characteristics and EHD performance of a three-electrode SDBD actuator.
- surface dielectric barrier discharge,
- three-electrode structure,
- electro-optical crystal,
- surface charge

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Nos. 51777026 and 11705075).

References (33)

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