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Article Dans Une Revue Experiments in Fluids Année : 2010

Estimation of three-dimensional flame surface densities from planar images in turbulent premixed combustion

Résumé

Turbulence motions are, by nature, three-dimensional while planar imaging techniques, widely used in turbulent combustion, give only access to two-dimensional information. For example, to extract flame surface densities, a key ingredient of some turbulent combustion models, from planar images implicitly assumes an instantaneously two-dimensional flow, neglecting the unresolved flame front wrinkling. The objective here is to estimate flame surface densities from two-dimensional measurements assuming that (1) the flow is statistically two dimensional; (2) the measuring plane is a plane of symmetry of the mean flow, either by translation (homogeneous third direction as in slot burners for example) or by rotation (axi-symmetrical flows such as jets) and (3) flame movements in transverse directions are similar. The unknown flame front wrinkling is then modelled from known quantities. An excellent agreement is achieved against direct numerical simulation (DNS) data where all three-dimensional quantities are known, but validations in other conditions (larger DNS, experiments) are required.

Dates et versions

hal-00493702 , version 1 (21-06-2010)

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Citer

Denis Veynante, Lodato Guido, Pascale Domingo, Luc Vervisch, Evatt R. Hawkes. Estimation of three-dimensional flame surface densities from planar images in turbulent premixed combustion. Experiments in Fluids, 2010, 49 (1), pp.267 - 278. ⟨10.1007/s00348-010-0851-y⟩. ⟨hal-00493702⟩
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