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Issue Eur. Phys. J. Appl. Phys.
Volume 22, Number 1, April 2003
Page(s) 41 - 49
Section Physics and Mechanics of Fluids
DOI 10.1051/epjap:2003006
Published online 25 February 2003

Eur. Phys. J. AP 22, 41-49 (2003)
DOI: 10.1051/epjap:2003006

Electric wind characterisation in negative point-to-plane corona discharges in air

Ph. Béquin, K. Castor and J. Scholten

Laboratoire d'Acoustique de l'Université du Maine, UMR - CNRS 6613, Université du Maine, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France

philippe.bequin@univ-lemans.fr

(Received: 4 January 2002 / Received in final form: 28 October 2002 / Accepted: 10 December 2002 Published online: 25 February 2003)

Abstract
In point-to-plane corona discharges in air, the collisions of charged particles with neutral particles induce a gas movement between the point to the plane called electric wind. A one-dimensional model of the neutral particle velocity along the discharge axis and between the electrodes is first developed. Laser Doppler Anemometry is used to measure the axial velocity profile of the gas between the electrodes. Discrepancies between experimental results and predictions of the on-axis velocity are discussed. Finally, the measured velocity profile compares quite well with a $\cos^5\theta$ distribution. Significant differences between measured and $\cos^5\theta$ profiles are observed near the discharge axis which could be attributed to the presence of seeding particles.  

PACS
51.10.+y - Kinetic and transport theory of gases.
51.35.+a - Mechanical properties; compressibility.
52.80.Hc - Glow; corona.

© EDP Sciences 2003


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