Numerical simulation of discharge process in surface dielectric-barrier-discharge on split covered electrode

Surface dielectric-barrier-discharge (DBD) is widely utilized for industrial applications as the source of low-temperature plasma. In recent years, the DBD plasma actuator has attracted attention as an active flow control device, which has been studied in the field of aerospace engineering. The electrode arrangements of the DBD plasma actuators diversify to improve their performance. The surface DBD is the key factor that affects the flow control performance of the DBD plasma actuator. In this study, we perform three-dimensional numerical simulations of the surface DBD on split covered electrodes for investigating the influence of the split of the covered electrode on discharge structures. The three-dimensional plasma fluid model is used for the discharge simulations, and the filamentation of the discharge is reproduced. A comparison of the discharge structures among various split conditions is conducted. The electric field on the dielectric surface is distorted by the split of the covered electrodes and discharge structures are changed, which may influence the performance of the DBD plasma actuator.