Experimental Study on the Average Discharge Current in Dielectric Barrier Discharge Under Atmospheric Pressure

Dielectric barrier discharge(DBD) is one form of gas discharges which produces non-thermal plasma.In order to optimize the structure of DBD generator and improve the discharging efficiency,the average discharge current of DBD is experimentally studied.Factors influencing the variation of average discharge current such as the applied voltage and frequency,the discharge gap distance and the thickness of barrier,are studied with the Q-U Lissajous figure.The experimental results are as follows: the symmetrical discharge is obtained by high applied frequency,thin electric barrier and small gas gap,with certain structure of DBD generator and gas in the discharge gap,the average discharge current and the discharge intensity will increase with the incrassation of voltage and applied frequency,the average discharge current will reduce with the incrassation of discharge gap distance and the thickness of barrier.Therefore the parameters of applied power and DBD generator should be optimized for improving the average discharge current.