Geometrical optimization of a surface DBD powered by a nanosecond pulsed high voltage

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• 作者：A.C. Aba'a Ndong ; ^{arthur.aba.a.ndong@univ-poitiers.fr} ; N. Zouzou ; N. Benard ; E. Moreau
• 关键词：Electrohydrodynamic ; Cold plasma ; Nanosecond pulsed high voltage ; Surface DBD
• 刊名：Journal of Electrostatics
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：71
• 期：3
• 页码：246-253
• 全文大小：2014 K

文摘

In this study, surface Dielectric Barrier Discharge (DBD) actuators powered by nanosecond pulsed high voltage are investigated. The goal is to experimentally characterize the surface DBD actuators in terms of electrical and geometrical parameters.

The actuators are made of two conducting electrodes separated by a thin dielectric (Kapton films) and arranged asymmetrically. The active electrode is connected to a pulsed high voltage power supply (voltage up to ¡À10?kV, rise and fall times of 50?ns and pulse width of 250?ns) and the second electrode is grounded.

The experimental results show that the energy per pulse (normalized by the length of the active electrode) is smaller when one increases the inter-electrode spacing between 1 and 3?mm, the thickness of the dielectric barrier between 120 and 360?¦Ìm or the length of the electrodes between 10 and 50?cm, for both applied voltage polarities.

Optical characterization of the plasma layer for different electrode gaps has been investigated by using an ICCD camera. Results indicate that the plasma produced by positive and negative rising voltage propagates in a streamer-like regime with numerous and well-distributed channels, for any electrode gap distance. However, the positive and negative falling voltage produces similar discharges only for large electrode gaps. In this case, the plasma layer starts from a corona spot in contact with the active electrode and expands in the direction of the grounded electrode in a plume shape.