Computational simulation of atmospheric pressure discharges with the needle-array electrode
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...
Gespeichert in:
Veröffentlicht in: | Physics of plasmas 2018-07, Vol.25 (7) |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | 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. |
---|---|
ISSN: | 1070-664X 1089-7674 |
DOI: | 10.1063/1.5029266 |