The discharge characteristics of dielectric barrier discharge（DBD）in gas-liquid mixture with the edgeplate

tube-plate

and mesh wire-plate electrode structures at atmospheric pressure in air were studied and compared by measuring voltage and current waveforms

taking lighting emission images

and using spectrum analysis.The changing trends of electrical parameters with the applied voltage were studied. Moreover

the discharge characteristics of DBD in gas-liquid mixture with different electrode structures were analyzed by combining gas dis-charge theory. The results show that the voltage and current waveforms

Lissajous figures

and optical emission spectrum of three electrode structure DBDs in gas-liquid mixture show different characteristics. At the same experimental conditions

the mesh wire-plate electrode structure DBD in gas-liquid mixture has the strongest discharge and the largest dissipated discharge power

and the discharge current can reach 140 m A. The arrangement of the electrode leads to difference non-uniform coefficient on electric field distribution

which is the main reason for the difference on discharge characteristics. With the increase in voltage amplitude

the discharge become strong

and the discharge power

molecular vibrational temperature and electron excited density all increase.