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Etude des effets de la haute pression sur la structure et la dynamique des flammes turbulentes de prémélange pauvre de méthane-air

Abstract : This experimental study aims to show the influence of pressure on a turbulent lean premixed methane-air flame stabilized on a Bunsen type burner. The mean flow velocity and the equivalence ratio of the reactants are set at 2.1 m/s and 0.6. Velocity field and turbulence scales are determined using laser Doppler anemometry. Rayleigh scattering measurements give information on the flame front fluctuations. From 2D Mie scattering images, flame curvature, orientation angle, wrinkling length, density and combustion intensity are obtained. Flame surface density and combustion intensity are compared to the values obtained from the BML model. When pressure rises, both Taylor and Kolmogorov scales decrease with the kinematic viscosity but the integral scale remains constant. Moreover the structures of the flame front become smaller and sharper, increasing the flame surface density.
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https://tel.archives-ouvertes.fr/tel-00010401
Contributor : Thierry Lachaux <>
Submitted on : Wednesday, October 5, 2005 - 4:30:50 AM
Last modification on : Thursday, March 5, 2020 - 6:49:21 PM
Long-term archiving on: : Friday, April 2, 2010 - 10:53:40 PM

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  • HAL Id : tel-00010401, version 1

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Thierry Lachaux. Etude des effets de la haute pression sur la structure et la dynamique des flammes turbulentes de prémélange pauvre de méthane-air. Energie électrique. Université d'Orléans, 2004. Français. ⟨tel-00010401⟩

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