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Article Dans Une Revue Comptes Rendus Mécanique Année : 2013

Responses of V-flames placed in an HF transverse acoustic field from a velocity to pressure antinode

Résumé

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 fo, the forcing frequency, or at fo/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.
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Dates et versions

hal-02024297 , version 1 (19-02-2019)

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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, 2013, 341 (1-2), pp.110-120. ⟨10.1016/j.crme.2012.10.015⟩. ⟨hal-02024297⟩
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