介质阻挡放电中水电极电导率对放电的影响

采用双水电极装置,在介质阻挡放电系统中,首次对水电极电导率对放电系统的影响进行了研究.实验测量了不同电导率下(电导率在2.8~10 000μS/cm范围内)的介质阻挡放电特性的变化规律,经分析发现:放电的击穿电压随电极电导率的变化而改变.电导率较小时,击穿电压随电导率的增大迅速地减小,电导率大于10μS/cm时,击穿电压基本保持不变.不同电极电导率下,击穿电压附近的斑图类型不同,其随电导率增大的变化规律与电导率保持不变时升高电压斑图的演化顺序具有一致性.放电回路的总电导与电极电导率的变化不成线性关系.

Influence of Electrode Conductivity on the Discharge in Dielectric Barrier Discharge

The influence of the electrode conductivity on the dielectric barrier discharge is investigated by using two water electrodes for the first time.The property variations of the dielectric barrier discharge as the changes of electrode conductivity(between 2.8～10 000 μS/cm) was studied.It is found that the breakdown voltage is changed with the electrode conductivity.The breakdown voltage falls sharply with the increased conductivity whose value is small,while nearly keeps constant when the conductivity is increased beyond the value of 10 μS/cm.Patterns generated at the breakdown moment are different as the electrode conductivity is changed.This is consistent with the pattern evolvement with the increased applied voltage and fixed conductivity.The total conductance of the electrocircuit has no linear relationship with electrode conductivity.