Plasma Characteristics of Capillary Coplanar Dielectric Barrier Discharge

被引：0
|
作者：
Wang R. [1 ]
Peng B. [1 ]
Jiang N. [1 ]
Li J. [1 ]
Wu Y. [1 ]
机构：
[1] School of Electrical Engineering, Dalian University of Technology, Dalian
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 10期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
capillary CDBD; electrode parameters; plasma characteristics; pulse parameters; streamer revolution;
D O I：
10.13336/j.1003-6520.hve.20221578
中图分类号：
学科分类号：
摘要：
Coplanar dielectric barrier discharge (CDBD) has a longer lifetime and a wide application prospect by having its high voltage and grounded electrodes buried in an insulating dielectric side by side. However, the traditional CDBD requires a relatively high voltage to be ignited and is complicated to manufacture, which may hinder its further development for application. Therefore, a new CDBD device which utilizes capillaries filled with copper powder as electrodes is proposed, and the close contact between the high-voltage and grounded electrodes can shorten the discharge gap to reduce the onset voltage. In this paper, the capillary CDBD are systematically investigated from the perspective of streamer development process, optical properties, electrical characteristics and active particles generation. In addition, the influences of the pulse voltage amplitude, rising edge, falling edge, peak flat top width, electrode diameter and relative permittivity of the dielectric on the plasma characteristics are also involved. The results show that there are two discharge processes of the primary discharge and the secondary discharge under single pulse, which respectively correspond to the positive and negative parts of the current waveform. During the rising edge phase of the pulse, the streamer is generated from the bottom of the "V-shaped" region, which then climbs along the dielectric surface of the high-voltage electrode and finally reaches the highest point. In the falling edge stage, the streamer mainly develops along the dielectric surface of the grounded electrodes. High pulse voltage, short pulse rise time and falling time are found to be beneficial to the enhancement of discharge intensity and the generation of active particles. Besides, the increase of the pulse rise time will pose a negative effect on the discharge uniformity while the influence of the pulse peak flat-top width is relatively limited. The increase of the relative permittivity can enhance the discharge intensity and reduce the initial voltage. Although a larger discharge region can be generated as the rise of electrode diameter, the discharge intensity is compromised. © 2023 Science Press. All rights reserved.
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页码：4445 / 4457
页数：12
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