Simulation of convection-stabilized modulated discharges in atmospheric-pressure air

A model describing modulated regimes of convection-stabilized discharges in atmospheric-pressure air is developed that accounts for deviation of the plasma state from the local thermodynamic equilibrium. The model is based on an approximate approach relating the variation of plasma parameters with time and their variation along the discharge axis. The validity of this approach is supported by agreement, for steady-state regimes, of calculated plasma parameters with those obtained on the basis of a more rigorous model. Results of calculation of modulated discharge parameters over a wide current range are presented for various current modulation frequencies and depths. (paper)