Dynamics of ns-SDBD plasma formation for aircraft icing control

Paper presents results of numerical modeling of nanosecond surface dielectric barrier discharge (ns-SDBD) for flow control using a heat release in highly nonequilibrium pulsed plasma. The major attention is paid to the effects based on ultrafast (on nanosecond time scale at atmospheric pressure) local heating of the gas, since at present the main successes in high-speed flow control using gas discharges are associated with namely this thermal effect. The mechanisms of ultrafast heating of air at high electric fields realized in these discharges, as well as during the decay of discharge plasma, are analyzed. the development of a flat plasma "sheet" along the dielectric surface is considered, and the transverse structure of the discharge is neglected. In this case, along with the traditional volumetric processes of the production and recombination of charged particles, it is necessary to take into account the processes of photoemission from the surface, photoionization of gas, leading to the formation of seed electrons in neutral air. Two-dimensional modeling of SDBD makes it possible to obtain a reasonable agreement between the experimental data and the calculation for integral discharge characteristics: the thickness of the plasma layer, the length of the discharge development.