单极性纳秒脉冲介质阻挡放电电荷传输特性实验分析

Experimental Analysis on Charges Transported in Dielectric Barrier Discharge Using Unipolar Nanosecond-pulse Generator

单极性高压脉冲电源激发介质阻挡放电(DBD)产生非平衡态等离子体具有很好的前景。为此,基于单极性ns脉冲电源实验研究了DBD电荷传输特性。通过改变实验条件,同时也研究了不同情况下放电的电荷传输以及能量消耗。研究了介质阻挡层厚度、介质阻挡层材料、气隙距离、施加脉冲电压幅值、重复频率和电压极性对放电电荷传输特性的影响。实验结果表明,随着介质厚度、气隙距离、施加脉冲电压幅值的增加,电荷传输量及放电能量增加;电压极性和重复频率对电荷传输特性影响很小;电荷传输量及放电能量在介质阻挡材料为环氧树脂时略大。

Dielectric barrier discharge（DBD） excited by unipolar high voltage pulses is a promising approach for producing non-thermal plasma at atmospheric pressure.We investigated the transported charges in DBD using a magnetic compression solid-state pulsed power generator,and illustrated the transported charges and consumed powers under different experimental conditions.Moreover,we investigated the effects of dielectric barrier,air gap spacing,applied voltage amplitude,repetition rate,and applied voltage polarity on the transported charges in the discharge.The experimental results show that when the thickness of dielectric barrier,air gap spacing are larger and the applied voltage amplitude are higher,more charges are transported and more power is consumed;the transported charges are slightly affected by the applied voltage polarity and frequency;more charges are transported when the dielectric barrier adopts epoxy.