Comptes Rendus
Two recent developments in numerical simulation of premixed and partially premixed turbulent flames
[Deux développements récents en simulation numérique de flammes turbulentes en combustion prémélangée et partiellement prémélangée]
Comptes Rendus. Mécanique, Volume 334 (2006) no. 8-9, pp. 523-530.

Un modèle de fermeture sous maille pour des simulations des grandes échelles de combustion turbulente prémélangée (FSD-PDF) est proposé. Il combine l'approche de Densité de Surface de Flamme (FSD) avec une densité de probabilité présumée (PDF) pour la variable qui traduit l'avancement de la réaction dans la tabulation utilisée pour la chimie. La méthode FSD est utile pour introduire dans la PDF présumée l'influence de la zone fine de réaction filtrée spatialement qui évolue à l'intérieur de la sous-maille. Ceci est obtenu via la relation exacte qui lie la PDF et la FSD. Dans une seconde partie, des résultats de Simulation Numérique Directe (DNS) pour de la combustion partiellement prémélangée dans un écoulement avec rotation (swirl) sont reportés. Les résultats sont utilisés pour analyser la structure de la flamme de bord d'entrée qui assure la stabilisation de la flamme.

A subgrid scale closure for Large Eddy Simulation of premixed turbulent combustion (FSD-PDF) is proposed. It combines the Flame Surface Density (FSD) approach with a presumed Probability Density Function (PDF) of the progress variable that is used in flamelet chemistry tabulation. The FSD is useful to introduce in the presumed PDF the influence of the spatially filtered thin reaction zone evolving within the subgrid. This is achieved via the exact relation between the PDF and the FSD. In a second part, Direct Numerical Simulation of partially premixed combustion in a swirling flow is reported. The results are used to analyze the structure of the leading edge flame that ensures flame stabilization.

Publié le :
DOI : 10.1016/j.crme.2006.07.008
Keywords: Turbulence, Combustion, Flames, Numerical simulation
Mot clés : Turbulence, Combustion, Flammes, Simulation numérique

Luc Vervisch 1 ; Pascale Domingo 1

1 INSA de Rouen, UMR-CNRS-6614-CORIA, campus du Madrillet, avenue de l'université, BP 8, 76801 Saint Étienne du Rouvray cedex, France
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     title = {Two recent developments in numerical simulation of premixed and partially premixed turbulent flames},
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Luc Vervisch; Pascale Domingo. Two recent developments in numerical simulation of premixed and partially premixed turbulent flames. Comptes Rendus. Mécanique, Volume 334 (2006) no. 8-9, pp. 523-530. doi : 10.1016/j.crme.2006.07.008. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2006.07.008/

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