Effects of pulse voltage rise rate on velocity, diameter and radical production of an atmospheric-pressure streamer discharge

Abstract

The effect of pulse rise rate on a streamer discharge is investigated through both experiments and simulations. Pulsed voltages with a pulse rise rate of 0.11-0.52 kV ns −1 are applied to point-to-plane electrode configurations, and the effects are observed from ICCD photographs. The streamer emission of light is simulated by a previously developed two-dimensional streamer simulation model, and the simulation results are compared with experimental results. The results show that as the pulse rise rate is decreased, there is a decrease in the discharge current, velocity of the primary streamer, diameter of the streamer channel and emission length of the secondary streamer. The simulated reduced electric field of the primary streamer head remains constant and does not depend on the pulse rise rate. The simulated temporal variations of O and OH radical production show that almost the same number of the radicals are produced in the primary streamer, regardless of the pulse rise rate. However, the radical production in the secondary streamer decreases as the pulse rise rate decreases. Therefore, the pulse rise rate affects the ratio of radical production in the primary streamer to that in the secondary streamer.

A numerical study of species and electric field distributions in pulsed DBD in oxygen for ozone generation

“…It is noted that the maximum values of average electron and atomic oxygen densities become higher at a higher pulse rise rate. The similar variation trend of atomic oxygen was reported by Komuro [29]. The reason is because a faster pulse rise rate leads to a larger change of electric field at a same time interval, which in turn improves generation rates of electron and oxygen atom.…”

Spatiotemporally resolved imaging of streamer discharges in air generated in a wire-cylinder reactor with (sub)nanosecond voltage pulses

“…Streamer development 1.1.1. Streamer propagation velocity There are many studies on streamer development under pulsed voltage conditions [2,5,6,12,22,7,8,9,38,39,10,3,11,40,41,42,43,44,45,46,4,47,48]. For instance, several researchers have reported on streamer propagation velocities for a range of voltages and rise times.…”

Simulation of Nanosecond Pulsed DBD Plasma Actuation with Different Rise Times

“…In nanosecond pulsed discharge with wire‐wire configuration, streamer propagation velocities at an applied voltage of 16.5 kV with rise times of 7.2 ns, 23.4 ns, and 40.2 ns are 0.92 mm/ns, 0.79 mm/ns, and 0.49 mm/ns, respectively . In nanosecond pulsed discharge with point‐to‐plane configuration, with rise rate increasing from 0.11 kV/ns to 0.52 kV/ns, there is an increase in the discharge current, velocity and diameter of the primary streamer, and emission length of the secondary streamer . In nanosecond pulsed direct current discharge plasma jet, with rise time decreasing from 4 µs to 40 ns, both the discharge current and the length of plasma plume are higher .…”

“…[16] In nanosecond pulsed discharge with point-to-plane configuration, with rise rate increasing from 0.11 kV/ns to 0.52 kV/ns, there is an increase in the discharge current, velocity and diameter of the primary streamer, and emission length of the secondary streamer. [17] In nanosecond pulsed direct current discharge plasma jet, with rise time decreasing from 4 ms to 40 ns, both the discharge current and the length of plasma plume are higher. [18] Therefore, in nanosecond pulsed discharge, it's almost universal that shorter rise time leads to stronger discharge and higher dissipated power.…”