In order to optimize the structure of dielectric barrier discharge（DBD） reactor and improve discharging efficiency

a needle array structure of copper stick electrodes is presented.The effects of five different electrode structures on the main parameters of discharge are studied by Q-V Lissajous figures in DBD experiment system.The five electrode structures include: smooth copper stick electrode

screw thread copper stick electrode

and three needle array copper stick electrodes with different spacing.The results show that increasing voltage can effectively enhance DBD power

average current and the amount of charge transferred in a cycle

and that the parameters of three needle array copper stick electrodes are larger than that of other two electrodes under the same voltage.With the applied voltage increasing

the equivalent capacitance of the air gap of the needle array copper stick electrodes increases

while that of the screw thread copper stick electrode and the smooth copper stick electrode decreases.Thereby

needle array copper stick electrode is more suitable for the removal of volatile organic compounds

and the shorter the needle spacing

the higher the energy utilization.