Abstract
Two-dimensional simulation of an atmospheric-pressure dielectric barrier discharge (DBD) was performed with different oxygen fractions, [O2]f, of 20%, 40%, 60%, 80%, and 99% in N2/O2 gas to investigate their effects on the primary and secondary streamers. We simulated the optical emission intensity at different [O2]f and compared them with the experimental values. The simulation results indicate that [O2]f affects the ratio of the amount of the electron production from electron impact ionizations and a photoionization, resulting in the changes in the electric field at the tip of the streamer and that in the streamer channel.
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