Numerical simulation study of ionization characteristics of argon dielectric barrier discharge

Abstract

In order to better analyze the characteristics of particle distribution and its influencing factors in the ionized space during the process of coaxial dielectric barrier discharge, the self-designed two-dimensional axisymmetric structure exciter was used to carry out optical diagnosis, with the electron temperature calculated through Gaussian fitting. Also, the plasma model was applied to conduct research on the discharge process through numerical simulation, with the electron density and electron temperature changes analyzed by using different discharge parameters. The research results show that with the increase of discharge voltage, pressure inside reactor and relative permittivity, the discharge process is promoted. In addition, the rise of current density leads to an increase in the number of charged particles on the surface of the medium during the discharge process, while the rise of discharge intensity causes an increase of the electron density. Electron temperature decreases due to the increased loss of collision energy between particles. These results are confirmed by the comparison of experimental data with simulation results.