介质阻挡放电的斑图和频域分析

Evolvement of Pattern Formation in Dielectric Barrier Discharge and the Frequency-domain Analysis

采用双水电极介质阻挡放电装置,利用光学方法研究了6.06×104Pa氩/空气混合气体的斑图演化过程.结果表明随驱动电压从击穿值不断增加,斑图经历了一系列的演变过程:均匀放电、六边形结构、随机微放电丝结构、第二次六边形斑图、四边形斑图、条带斑图、最后又出现均匀放电.用二维傅立叶变换的方法把斑图变换到频域中,得到了频域下的斑图并对其进行了分析.

Pattern formation dynamics was studied in a dielectric barrier discharge system with mixed working gas of argon and air at 6.06×104 Pa with water electrodes.The experimental results show that the discharge pattern with increasing the applied voltage undergoes a scenario: uniform discharge,hexagon structure,stochastic micro-discharge filaments,hexagon structure again, square pattern,regular stripes that bridge the boundary,and uniform discharge again.The patterns were transformed into Fourier space by two dimension Fast Fourier Transform.The spectrums of patterns were given and analyzed.