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Indexed by:期刊论文

Date of Publication:2018-07-01

Journal:PHYSICS OF PLASMAS

Included Journals:SCIE

Volume:25

Issue:7

ISSN No.:1070-664X

Abstract:Needle-electrode discharge with the advantage of high flexibility and low broken-down voltage, etc., is desirable for many plasma applications. However, such applications are limited by its small treatment scale. Arranging needles together in parallel provides a feasible way to enlarge the treatment area. The interaction among the needles, however, cannot be ignored and is desirable to be discussed. In this paper, a 2-D self-consistent fluid model is developed to study the atmospheric pressure discharge with single-needle and needle-array electrodes. It is observed that the streamer generated by surrounding needle tends to propagate with a curving trajectory, i.e., it is initially repulsive by the central streamer and then bends towards the central axis. Additionally, the central needle discharge is restricted by adjacent needle discharge, if the distance between needles is relatively small. Several ways are put forward to improve the discharge spatial uniformity in the needle-array electrode. Published by AIP Publishing.