气隙宽度对大气压氦气介质阻挡放电多脉冲特性影响的仿真研究

doi:10.19595/j.cnki.1000-6753.tces.180107

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Abstract Gap width d is a significant regulatory parameter of dielectric barrier discharges (DBDs). In this paper, a one-dimensional fluid model with parallel plate electrodes was built to study the influence of gap width on the multipeak characteristics of the atmospheric helium DBDs. The study was focus on three parameters, namely the current pulse amplitude I_m, the current pulse width l and the pulse amplitude phase φ. Results show that upregulating the gap width from 0.5mm to 4.5mm, I_m first rises, then declines; l continuously descends, and finally tends to be stable; and φ increases monotonically. When d is less than 3mm, the discharge represents multi current pulses (MCP). With larger d, the discharge displays a single current pulse (SCP). Discharge mechanism analysis indicates the multipeak discharge in short gap (d≤1.5mm) operates at the Townsend discharge mode. In the case, local high-density space charge is formed in the vicinity of the anode, which builds an electric field having the same direction with the applied electric field, thus enhancing gap voltage V_g. Therefore, V_g can be quickly recovered to the level to trigger the successive breakdown, resulting in the MCP. The discharge in a wide gap(d≥2.0mm) manifests the glow discharge characteristics. The glow discharge exists in the gap where the residual space charge is approximately well distributed, i.e. it builds a lower electric filed, which makes it difficult for the discharge to breakdown again in half cycle.

Key words： Dielectric barrier discharge gap width multi current pulse discharge mode

Received: 23 January 2018 Published: 01 March 2019

PACS:	TM85
	O53

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	Wan Jing
	Ning Wenjun
	Zhang Yuhui
	Dai Dong

Cite this article:

Wan Jing,Ning Wenjun,Zhang Yuhui等. Influence of Gap Width on the Multipeak Characteristics of Atmospheric Pressure Helium Dielectric Barrier Discharges—a Numerical Approach[J]. Transactions of China Electrotechnical Society, 2019, 34(4): 871-879.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180107 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I4/871

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