Numerical Modeling of Pulse-Periodic Nanosecond Discharges

Abstract

The first results of the numerical simulation of the Pulse-Periodic Nanosecond discharge in pin-to-pin configuration in 2Dt approximation of the full self-consist system of Navier-Stocks equation for real thermo-chemically non-equilibrium gases, drift-diffusion approximation of the low temperature plasma evolution in external electric and magnetic field and, alternative – arc (spark) discharge model of high-density energy input discharge. The intuitive criteria of the alternative discharge models re-switch are proposed and tested. The pin-to-pin the pulse-periodic nanosecond 5-MHz discharge has been considered for 1 microsecond interval. It was found that rather strong longitudinal non-uniformities of main physical parameters are created at the first corona stage of the interelectrode conducting channel. These nonuniformities reveal long-lived features that have define strong effect on the discharge performance

Development of mathematical model and numerical simulation of plasma ignition of flammable mixture with microwave subcritical streamer discharge

“…For the problem of heating pure nitrogen by a microwave discharge, at least 56 reactions and 15 types of particles are taken into account, together with a temperature of the medium, which describes the vibrational states of nitrogen during non-equilibrium excitation [12]. The complexity of a complete calculation of plasma in a medium even without fuel is also evidenced by the study [13], in which the results of a consistent calculation of a nanosecond inter-electrode discharge were obtained. In [14], various types of medium heating by plasma are considered.…”