Azimuthal Stability of Trichel Pulses and Cathode Directed Streamers

Abstract

The numerical simulations of negative corona discharge in Trichel pulse mode are carried out with the calculation of evolution of azimuthal perturbations. It is found the azimuthal instability with increment corresponding to avalanche development. This instability is suppressed at the nonlinear stage and does not lead to the process branching. The result is also applicable to the azimuthal instability of the cathode directed streamer, found earlier. The difference in their increments is followed from the difference in courses of the processess, which is discuss.

Simulation of the AC corona phenomenon with experimental validation

“…The effects of a fluid flow have been included in [22]: a non-null velocity of the neutral species tends to cause negative charges to drift away from the ionization source, thus affecting the repetition rate. The effects of photoionization have been discussed, for instance, in [23], and a more detailed analysis, regarding the shape of a single current impulse, has been carried out in [24]. Another very important aspect related to the corona is the formation of chemical species such as ozone; this latter situation has been analysed in [12].…”