Ultrasound generated by alternating current dielectric barrier discharge plasma in quiescent air

介质阻挡放电 交流电 等离子体 电流(流体) 超声波 电介质 材料科学 化学 分析化学(期刊) 声学 光电子学 物理 热力学 电压 电气工程 色谱法 工程类 量子力学
作者
Xin Zhang,Yonggang Cui,Chien Ming Jonathan Tay,Boo Cheong Khoo
出处
期刊:Plasma Sources Science and Technology [IOP Publishing]
卷期号:29 (1): 015017-015017 被引量:15
标识
DOI:10.1088/1361-6595/ab5733
摘要

Dielectric barrier discharge (DBD) driven by Alternating Current (AC) high-voltage power supply, also called silent discharge, has been known for more than a century since Siemens first proposed the term DBD in 1857, and penetrates into our daily lives. In our traditional view, AC-DBD is considered as an ozone generator for disinfection, an electronic emitter for depollution of gas streams, a jet actuator for flow control, and so on. However, the acoustic effect of AC-DBD is always neglected. Here, we demonstrate that an asymmetrical DBD plasma actuator which was powered by sinusoidal AC waveforms with an AC voltage of 16 kVp-p at a high voltage frequency of a few kHz can generate ultrasound in quiescent air by using a pressure-field microphone and a high accuracy phase-lock image Schlieren technique. The frequency of this induced ultrasound is approximately 100 kHz which is much higher than the sin high voltage frequency of a few kHz. It is the first time that ultrasound created by the AC-DBD is observed. This finding provides a comprehensive understanding of AC-DBD and might open up possibilities for novel industrial applications of AC-DBD by using the induced ultrasonic energy. In addition, according to the experimental results, a hypothesis is proposed on the formation mechanism of ultrasound generated by the AC-DBD.
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