发射光谱研究多针对板正电晕放电形貌

doi:10.3964/j.issn.1000-0593(2008)09-1998-05

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Abstract Using the method of OES (optical emission spectrum) for measuring N₂ emission spectrum, the distribution of the energetic electrons in multi-needle-to-plate positive corona discharge at atmospheric pressure was investigated, and compared with that in negative corona discharge. According to the distribution of N₂ second positive band’s intensity I_SPB, the outline of the ionization region in glow discharge and the streamer channel were drawn rather accurately. The relationship between I_SPB and the discharge current I in glow discharge can be obtained through the volume integral of the I_SPB. In glow discharge, both the ionization region scale and I_SPB are smaller than in negative corona discharge, the electron avalanche develops farther along the radius direction of needle than along axis direction, and only the arrange along axis direction is enhanced slightly with the rise of the applied voltage U. The integral of I_SPB is second order linear to I. In streamer discharge, the discharge channels develop from needlepoint to the plate, while the shape of the region in which I_SPB is higher looks like a bullet. The density of energetic electron in the channel farther away from the needlepoint is relatively uniform along the axis direction, but first increases then decreases along the radius direction.

Key words：Emission spectrum;Glow discharge;Streamer discharge;Ionization region;Streamer channel;Electron avalanche;Energetic electron;N₂ second positive band’s intensity

Received: 2007-03-25 Accepted: 2007-06-29

ZTFLH:

O56

Corresponding Authors: ZHU Yi-min E-mail: ntp@newmail.dlmu.edu.cn

Cite this article:

SU Peng-hao,ZHU Yi-min,CHEN Hai-feng. Morphology Determination of Multi-Needle-to-Plate Positive Corona Discharge[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(09): 1998-2002.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2008)09-1998-05 OR https://www.gpxygpfx.com/EN/Y2008/V28/I09/1998

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