Numerical Investigation on the Effects of Electrical Parameter on a Nanosecond Pulsed Surface Dielectric Barrier Discharge

Abstract

The plasma discharge process includes the excitation ionization caused by electron collision and the transport and reaction process between particles in each state. The particles and reactions of the discharge under atmospheric pressure air environment are very complex. To deepen the understanding of the physics of nanosecond pulse surface dielectric barrier discharge (NS-SDBD), describe the discharge particle types and reaction equilibrium, a two-dimensional fluid model on the basis of the chemical reactions of 6 kinds of particles and 13 discharge chemical reactions is constructed to numerically simulate the NS-SDBD discharge process of $\mathrm{N}_{2-}\mathrm{O}_{2}$ gas mixture at atmospheric pressure. The continuity equation, energy conservation equation and Poisson’s equation are solved in the simulation process. The simulation results show that there are two discharges in the process of pulse voltage rising and falling. As the amplitude of the pulse voltage increases, the earlier the first discharge current pulse appears, and the time interval of adjacent current pulses also changes. As the time of rising and falling edge of the pulse increase, the peak value of discharge current gradually decreases, and the falling edge has less influence on the discharge shape than the rising edge.