Abstract
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. To cite this article: L. Vervisch, P. Domingo, C. R. Mecanique 334 (2006).
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