Numerical simulation and comparison with experiment for a positive point to plane corona discharges in dry air
Résumé
This paper is devoted to preliminary comparisons between umerical simulation and experiment results obtained in the case of positive point to plane corona discharges in dry air at atmospheric pressure. The operating conditions correspond to inter-electrodes distances lower than 1cm with a tip radius of 20μm for both DC and pulsed applied voltages. The first comparison corresponds to the discharge current. The second one is performed between the streak camera picture and the spatiotemporal evolution of the calculated ionization rate. The parallel between these experimental and calculated evolutions is very interesting because this emphasizes in an amazing way the qualitative agreement between experiment and calculation in the development of primary and secondary streamers. The calculations are based on two dimensional electrohydrodynamic model of a first order including the main charged particle/gas reactions occurring in a dry air discharge.