Turbulence effects on an ambient pressure discharge

Abstract

This work reports on observations of a diffuse discharge in a turbulent air flow. The discharge power was monitored as a function of velocity and turbulence spectrum in a fixed electrode configuration. The flow direction was also reversed to check on the effect of convection. The flow increased the sparking voltage, and turbulence made the current distribution considerably more homogeneous; the discharge power increased from about l W with no flow to about 250 W with 60-m/sec grid-generated turbulent flow. This turbulence was most intense in the range between l and 10 kHz.

On basic processes sustaining constricted glow discharge in longitudinal N2 flow at atmospheric pressure

“…This situation can be realized in pulsed discharges in dense gases when the discharge duration is much shorter than the time needed for the establishment of the gradient transfer processes [4]. If condition 2 /4D < L /V < L 2 ⊥ /4D is fulfilled, the stationary and homogeneous plasma can also be created by a steady-state multisectioned discharge which is stabilized with a transverse turbulence gas flow [5][6][7][8][9] (here is the spatial period of a discharge sectioning, L and L ⊥ are discharge dimensions along and across the flow direction, V is the gas flow velocity, D is the total diffusion coefficient taking into account the molecular and turbulent diffusion as well).…”