Investigations on the Flamelet Inner Structure of Turbulent Premixed Flames

Fabien Halter 1 Christian Chauveau 1 Iskender Gökalp 1
1 ICARE - Institut de Combustion, Aérothermique, Réactivité et Environnement
Abstract : Planar Rayleigh scattering measurements were used to investigate the inner structure of flamelets in premixed turbulent Bunsen flames. Measurements were performed in a high pressure chamber, where pressure is varied from 0.3 to 0.9 MPa. Two lean equivalence ratios (0.6 and 0.7) of methane=air mixtures were studied. Local information regarding the thickness and the local curvature of the flamelets were obtained. It is observed that an increase of the equivalence ratio induces a decrease of the mean local flamelet thickness. When pressure is increased from 0.3 to 0.9 MPa, the mean flamelet thickness does not decrease as for laminar case. The different external phenomena (turbulence and stretch (curvature and strain rate)) which could explain this trend are investigated.
Keywords : 2D Rayleigh scattering High pressure Local flamelet thickness Turbulent combustion
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Journal articles
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https://hal.archives-ouvertes.fr/hal-01859292
Contributor : Christian Chauveau <>
Submitted on : Tuesday, August 21, 2018 - 9:51:49 PM
Last modification on : Thursday, March 21, 2019 - 9:06:12 AM

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Fabien Halter, Christian Chauveau, Iskender Gökalp. Investigations on the Flamelet Inner Structure of Turbulent Premixed Flames. Combustion Science and Technology, Taylor & Francis, 2008, 180 (4), pp.713 - 728. ⟨10.1080/00102200701851266⟩. ⟨hal-01859292⟩

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