Comptes Rendus
Combustion, flow and spray dynamics for aerospace propulsion
Responses of V-flames placed in an HF transverse acoustic field from a velocity to pressure antinode
Comptes Rendus. Mécanique, Combustion, spray and flow dynamics for aerospace propulsion, Volume 341 (2013) no. 1-2, pp. 110-120.

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 f0, the forcing frequency, or at f0/2 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.

Publié le :
DOI : 10.1016/j.crme.2012.10.015
Mots-clés : Laminar combustion, Premixed flame dynamics, Acoustic azimuthal wave, Flame and flow instabilities

Florian Lespinasse 1 ; Françoise Baillot 1 ; Toufik Boushaki 2

1 CORIA UMR 6614 CNRS, site universitaire du Madrillet, 76801 Saint-Etienne-du-Rouvray, France
2 ICARE UPR 3021 CNRS, 1C, avenue de la recherche scientifique, 45071 Orleans, France
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Florian Lespinasse; Françoise Baillot; Toufik Boushaki. Responses of V-flames placed in an HF transverse acoustic field from a velocity to pressure antinode. Comptes Rendus. Mécanique, Combustion, spray and flow dynamics for aerospace propulsion, Volume 341 (2013) no. 1-2, pp. 110-120. doi : 10.1016/j.crme.2012.10.015. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2012.10.015/

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