Theoretical modeling of pulse discharge cycle in dielectric barrier discharge plasma actuator

摘要

Simple models based on two-dimensional simulations are proposed to estimate intervals of periodically observed current pulses with a positivegoing voltage in a dielectric barrier discharge plasma actuator. There are two distinct peaks in one streamer discharge; one is related to the formation of an ion cloud and the other is related to a filamentary discharge that is identified as a streamer. Simulation results show that the intervals of the current pulses depend on the slope of the applied voltage. For the ion-cloud formation phase, we model the time evolution of electron number density at the exposed electrode with ionization frequency. For the ion-cloud expansion phase, a positive ion cylinder model is proposed to estimate the electric field generated by surface charge on the dielectric. These models well reproduce the discharge intervals obtained in the numerical simulations. (C) 2016 The Japan Society of Applied Physics