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A Gliding Discharge in Open Air Sustained by High-Voltage Resonant AC Power Supply

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7 Author(s)
Cheng Zhang ; Key Lab. of Power Electron. & Electr. Drive, Inst. of Electr. Eng., Beijing, China ; Tao Shao ; Jiayu Xu ; Hao Ma
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Gliding discharges can generate nonthermal plasma at atmospheric pressure. Therefore, they are widely used in plasma-assisted ignition and combustion. In this paper, the gliding discharge sustained by a resonant ac power supply was obtained with a pin-to-pin electrode geometry, and the characteristics of such discharge were investigated through its voltage-current and discharge images. Inceptive, nonstable, and stable stages involved in this gliding discharge were studied. Experimental results showed that the discharge was first ignited by a spark with a current peak of tens of amperes and soon turned into a stable stage, where the discharge respectively behaved in repetitive spark mode with a current peak of several amperes in a small gap and glowlike mode with a current peak of several microamperes in a relatively large gap spacing. Under a certain situation, a nonstable discharge was observed, which changed from a spark discharge to a glowlike discharge after some time. In addition, both the discharge stability and the breakdown voltage were influenced by the air flow. The discharge became unstable when the air flow exceeded 3 L/min.

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Plasma Science, IEEE Transactions on  (Volume:40 ,  Issue: 11 )