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Comptes Rendus Mécanique
Volume 341, n° 1-2
pages 110-120 (janvier 2013)
Doi : 10.1016/j.crme.2012.10.015
Responses of V-flames placed in an HF transverse acoustic field from a velocity to pressure antinode
 

Florian Lespinasse a, , Françoise Baillot a, Toufik Boushaki b
a CORIA UMR 6614 CNRS, site universitaire du Madrillet, 76801 Saint-Etienne-du-Rouvray, France 
b ICARE UPR 3021 CNRS, 1C, avenue de la recherche scientifique, 45071 Orleans, France 

Corresponding author.
Abstract

A V-flame stabilized by a vertical cylindrical rod in an annular jet is positioned at different points of an acoustic transverse field. Original mechanisms highlight flame and flow dynamics: vertical mass flow rate modulation resulting from a longitudinal-type wave induced by the pressure fluctuations of the transverse wave; jet and flame dissymmetry caused by acoustic energy effects; CH* emission modulations, related to heat release rate modulations, fluctuating at  , the forcing frequency, or at   due to a vortex pairing phenomenon; flame blowout induced by the competition between vertical and lateral displacements due to the induced axial and transverse acoustic velocities, respectively.

The full text of this article is available in PDF format.

Keywords : Laminar combustion, Premixed flame dynamics, Acoustic azimuthal wave, Flame and flow instabilities




© 2012  Published by Elsevier Masson SAS de la part de Académie des sciences.
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