Numerical Calculation of Electrophysical and Thermodynamic Characteristics of Glow Discharge Plasma in Atmospheric Pressure Oxygen Formed After Spark Breakdown

The paper presents the results of numerical calculations by finite elements method of the spatiotemporal dynamic of electrophysical and thermodynamic characteristics of atmospheric pressure oxygen plasma after the spark breakdown in the gas-discharge gap of 1 mm. Calculations relied on the use of two-dimensional axially symmetric model of plasma in drift-diffusion approximation, as well as Navier-Stokes and thermal conductivity equations. Discharge characteristics were calculated considering and without considering the plasma heating for various electrical circuit parameters. It was shown that at breakdown voltage of 3500 V and plasma heating, the discharge development leads to formation of the independent stationary discharge of constant current localized in a finite volume. Comparative analysis was done of the impact of electronegative properties of gas and plasma heating on the spatiotemporal dynamic of electrophysical and thermodynamic discharge characteristics.