不同气压条件下空气介质阻挡放电的特性

建立了一套放电装置,放电室内的空气压力可调。设计并制作了单面梳状和平行双平面两种电极板,在不同气压环境下进行空气介质阻挡放电实验。拍摄记录了放电现象,采用电荷-电压(q-V)法处理了放电的有关测量数据,对实验结果进行了分析。研究结果表明,空气介质阻挡放电的特性变化与放电环境气压有关。在各种气压条件下,该文的介质阻挡放电均呈脉冲群间歇性;随着放电环境气压减小,放电由常压下的粗大流注电晕逐渐变成细而密集的细丝状微流注电晕,直至融合为貌似辉光放电;放电脉冲群的密度和宽度也随气压降低而增加,但脉冲幅值减小。放电的有功功率随气压变化并非单调增减,当放电气压约为0.04 MPa时,消耗的有功功率最小,常压下和近真空时放电的有功功率都要大得多。

Characteristic of the Dielectric Barrier Discharge in Air at Difference Pressure

A setup for DBD(Dielectric Barrier Discharge) at different air pressure was built up.Two kinds of electrode,plate-plate and a plate-strip like comb,were designed and made.The phenomenon of the DBD was shot and the data of the DBD experiment at different air pressure were recorded and analyzed.The results presented that the characteristic of the DBD in air changed related with surrounding pressure.The DBD was excited by intermittent cluster of impulses at different pressure.As the decrease of the pressure,the corona discharge of the DBD appeared from sparse column to dense filament until it developed into homogeneous glow-like discharge,and the density and the width of the impulse cluster increased,but its amplitude reduced.The power in the DBD discharge varied with the pressure non-monotonously and it reached its lowest point while the pressure was about 0.04 MPa,which was far less than that at atmosphere pressure and near vacuum.