An approach for unipolar corona discharge in N2/O2 gas mixture by considering townsend conditions

In this study (α/p) = f(E/p) functional relation is derived for the gas mixture of N2/O2 by considering Townsend approach, and formation mechanism of corona discharge is investigated for the coaxial electrode system located in this gas medium. The electron energy distribution function (EEDF) which is required for estimation of ionization coefficient, is determined by considering probability distribution function of inelastic electron collisions versus energy. An algorithm for determining ionization coefficient for binary gas mixture is presented. The development and motion of the electron avalanche in inter-electrode gap are studied by considering the effect of positive space charges. It is determined by considering the derived mathematical expressions that the formation of corona discharge is related with the variation of the current characteristics in inter-electrode gaps depending on the change of potential of central electrode.

► Unipolar corona discharge is investigated by considering Townsend approach, impact ionization and attachment processes in coaxial electrode system.
► (α/p) = f(E/p) functional relation is derived for the gas mixture of N2/O2.
► The relation between formation of corona discharge and variation of the current characteristics in inter-electrode gap depending on the change in the potential of central electrode is demonstrated.