Transverse glow discharges in supersonic air and methane flows

Transverse glow discharges in supersonic air and methane flows are studied both experimentally and theoretically. The experiments show that a diffuse volume discharge filling the whole cross section of the flow can easily be initiated in air, whereas a diffuse discharge in a methane flow shows a ten...

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Bibliographic Details
Published in:Plasma physics reports 2006-03, Vol.32 (3), p.254-261
Main Authors: Denisova, N. V., Postnikov, B. V., Fomin, V. M.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AIR
BOLTZMANN EQUATION
DISSOCIATION
ELECTRIC FIELDS
ELECTRONS
ENERGY SPECTRA
EXCITATION
FUNCTIONS
GLOW DISCHARGES
IONIZATION
METHANE
MOBILITY
MOLECULES
PLASMA
POSITIVE COLUMN
VELOCITY
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Summary:Transverse glow discharges in supersonic air and methane flows are studied both experimentally and theoretically. The experiments show that a diffuse volume discharge filling the whole cross section of the flow can easily be initiated in air, whereas a diffuse discharge in a methane flow shows a tendency to transition into a constricted mode. The electron transport coefficients (mobility and drift velocity) and the kinetic coefficients (such as collisional excitation rates of the vibrational levels of a methane molecule, as well as dissociation and ionization rates) are calculated by numerically solving the Boltzmann equation for the electron energy distribution function. The calculated coefficients are used to estimate the parameters of the plasma and the electric field in the positive column of a discharge in methane.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X06030081