A priori analysis of turbulent flamelet combustion in a premixed spherical flame kernel

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Abstract

Three-dimensional direct numerical simulations are performed of turbulent combustion of initially spherical flame kernels. The chemistry is described by a progress variable which is attached to a flamelet library. In order to progress towards turbulent closure of such a system the validity of the flamelet approach must be studied. Then the turbulent closure of the equation for the progress variable should be investigated. The influence of flame stretch and curvature on the local mass burning rate is studied and compared to an analytical model. Then first investigations of the relative importance of the unresolved turbulent flux compared to the source term of the progress variable are presented.
Original languageEnglish
Title of host publicationProceedings of the European Combustion Meeting : Louvain-la-Neuve, Belgium, April 3 - 6, 2005
EditorsV. Dias
Place of PublicationLouvain-la-Neuve
PublisherCombustion Institute, Belgian Section
PagesPaper-134
Publication statusPublished - 2005

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