1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Development of ac corona discharge modes at atmospheric pressure
Rent:
Rent this article for
USD
10.1063/1.3553455
/content/aip/journal/pop/18/2/10.1063/1.3553455
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/2/10.1063/1.3553455
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of wire-duct reactor. The reactor has internal dimensions of 20 cm length, 7.5 cm width, and 5 cm length. Its walls are made from a transparent Perspex sheet of 5 mm thickness. The plate to plate spacing of the duct is variable up to 5 cm and the discharge wire is tensioned midway between the plates.

Image of FIG. 2.
FIG. 2.

Current-voltage characteristics of ac coronas generated in the wire-duct reactor had (a) constant gap spacing and constant wire radius for different gases. The graphs show how the characteristics are influenced by the type of the flowing gas inside the reactor under the same discharge conditions; (b) constant wire radius for different gap spacing in . The graphs show that ac discharge corona current increases as the gap spacing decreases at the same applied voltage whatever the discharge conditions; and (c) constant gap spacing for different radii of the discharge wire in . The graphs show stability of the ac discharge current values of the investigated gas at higher applied ac voltages.

Image of FIG. 3.
FIG. 3.

Successive current-voltage oscillograms generated in an air-fed wire-duct reactor stressed by ac voltage ( and ). (a) The discharge starts with the form of onset streamers in both positive and negative half-cycles; (b) the onset streamers disappear gradually and followed by stable glow mode; [(c) and (d)] the streamers are superimposed on a steady negative current in the negative voltage half-cycles.

Image of FIG. 4.
FIG. 4.

Successive current-voltage oscillograms generated in oxygen-fed wire-duct reactor stressed by ac voltage ( and ). (a) The discharge starts with the form of onset streamers in both positive and negative half-cycles; [(b) and (c)] the onset streamers exist only in the positive half-cycles; (d) the streamers are superimposed on a steady discharge current in both positive and negative in half-cycles.

Image of FIG. 5.
FIG. 5.

Successive current-voltage oscillograms generated in an argon-fed wire-duct reactor stressed by ac voltage ( and ). When the ac applied voltage is increased to the onset of the corona discharge, repetitive pulses are observed in both positive and negative half-cycles.

Image of FIG. 6.
FIG. 6.

Successive current-voltage oscillograms generated in helium-fed wire-duct reactor stressed by ac voltage ( and ). As the ac applied voltage is increased to the corona onset voltage, the pulsed mode is observed in both positive and negative half-cycles.

Image of FIG. 7.
FIG. 7.

Photomicrographs showing the ac corona glow modes recorded around the discharge wire in: (I) air, (II) , (III) , (IV) Ar, and (V) He gas fed wire-duct reactor ( and ). The corona plasma is simply a combination of the modes that appear with the positive and negative dc coronas (Ref. 9). The glow starts at the onset voltage as small spots with faint glows separating them along the discharge wire. At higher currents, the glow appears almost uniform around the discharge wire mixing with small spots.

Loading

Article metrics loading...

/content/aip/journal/pop/18/2/10.1063/1.3553455
2011-02-09
2014-04-25
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Development of ac corona discharge modes at atmospheric pressure
http://aip.metastore.ingenta.com/content/aip/journal/pop/18/2/10.1063/1.3553455
10.1063/1.3553455
SEARCH_EXPAND_ITEM