Determination of Helium-Discharge Atmospheric-Pressure Plasma Parameters and Distribution Using Numerical Simulation

Abstract

This study investigated the chemical distribution of an atmospheric-pressure plasma jet (APPJ) along its propagation direction using numerical simulation. Low-resolution spectral data were used to estimate the gas temperature and the excitation temperature. These estimations were used with a collisional-radiative model to elucidate population densities and the electron temperature. A global model was applied to investigate the chemical species distribution in the plasma jet. The thermodynamic properties of the APPJ corresponded well to the relation T_g < T_exc < T_e for all the positions along the jet propagation. Chemical species generation and propagation along the plasma jet were numerically simulated using the GM with input parameters derived from the CR model and the ideal gas law.