管-管和管-板电极介质阻挡放电特性研究

电极结构对介质阻挡放电(DBD)的放电特性有重要影响,研究和比较不同电极结构DBD的放电特性,对优化DBD反应器结构和提高放电效率具有重要意义。笔者实验研究和比较了大气压空气中管-管电极和管-板电极DBD的放电特性,比较了它们电压电流波形图、李萨育图形以及发光图像的区别,研究了不同电压幅值下放电参量的变化,并从放电机理上对实验结果给出合理解释。结果表明:管-板电极DBD的电气特性和发光特性与管-板电极DBD有明显的区别,相对于管-管电极DBD,管-板电极DBD的放电更稳定,放电细丝分布更均匀;随着外加电压幅值的增加,两种电极结构DBD的放电持续时间、电流幅值、放电功率和传输电荷量都增加,在相同外加电压幅值下,管-板电极DBD的各参量均大于管-管电极DBD。

Characteristics of Dielectric Barrier Discharge in Tube-Tube Electrode and Tube-Plate Electrode

To optimize the dielectric barrier discharge(DBD) reactor structure and improve discharge efficiency,the DBD characteristics of tube-tube electrode and tube-plate electrode in atmosphere are experimentally studied.Their voltage and current waveforms,Lissajous figures and light emission pictures are compared,the change of discharge parameters with applied voltage are investigated,and the experimental results are explained on the basis of the discharge mechanism.The conclusions include that: the electrical characteristics and light-emission properties of DBD of the two electrodes are quite different,for tube-plate electrode the DBD is more stable,and the distribution of discharge filaments is more uniform compared with tube-tube electrode;The DBD duration,current amplitude,power and transferred charge of these two electrodes all increase with the increase of applied voltage,and at same applied voltage,all the parameters of tube-plate electrode DBD are larger than that of tube-tube electrode DBD.