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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v12.i1-2.20
pages 11-22

DESCRIPTIVE NUMERICAL APPROACH OF THE INFLUENCE OF AN ELECTRICAL DISCHARGE ON A AIR FLOW

D. Semmar
Department of Mechanics, University Saad Dahleb-Blida Route de Soumâa, BP 270, 09000 Blida-Algerie; and GREMI, UMR 6606, University of Orleans 14 rue d'Issoudun, BP 6744, 45067 Orléans Cedex 2
J. M. Bauchire
GREMI, UMR 6606, University of Orleans, France
Dunpin Hong
GREMI, UMR 6606, University of Orleans, France
N. Ait Messaoudene
Department of Mechanics, University Saad Dahleb-Blida Route de Soumâa, BP 270, 09000 Blida-Algerie

RESUMO

Plasmas generated by electrical discharges at atmospheric pressure have lately been tested as new tools for acting on flows. Experimental results confirm that this type of electroaerodynamic triggers can effectively contribute to the modification of moving fluid properties. The operating modes of electrical discharges as well as the phenomena which contribute to such a result are poorly understood though. Large discrepancies are seen according to the type of discharge which is used, suggesting that the mechanisms of action are not yet identified. The present work is a theoretical study based on the numerical simulation of the steady state behavior of a crown discharge in pure air at atmospheric pressure. The mathematical model is composed of the laminar flow equations (mass and momentum conservation) and the Poisson equation for the computation of the electrical potential. The influence of the electrical field on the flow is taken into account by the addition of the electrical force term in the Navier Stokes equations. The validation of the model is based on experimental observations. The variation of dynamic, geometrical and electrical parameters is also studied. Fluent 6.3 software is used to perform numerical computations.


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