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ANALYSIS OF SCALAR DISSIPATION RATE AND TURBULENT TRANSPORT IN LES OF PREMIXED TURBULENT COMBUSTION

Pascale Domingo
CORIA - CNRS & INSA Rouen, BP 8, 76801 Saint-Etienne-du-Rouvray, France

Luc Vervisch
CORIA - CNRS & INSA Rouen, BP 8, 76801 Saint-Etienne-du-Rouvray, France

Sandra Payet
LMFN - UMR6614 - CORIA, INSA de Rouen - Campus du Madrillet, BP8 F-76801 Saint-Etienne-du-Rouvray Cedex, France

Raphael Hauguel
LMFN / CORIA UMR CNRS 6614 University of Rouen INSA, Avenue de I'universite 76800 Saint Etienne du Rouvray, France

Abstrakt

Using a priori filtering of DNS of a premixed turbulent V-shape flame, closures for the filtered scalar dissipation rate and turbulent transport are discussed. Then, a novel subgrid scale closure for Large Eddy Simulation of premixed combustion is proposed. This approach combines a presumed Probability Density Function, accounting for the subgrid scale characteristic flame length scale, with a flame tabulated chemistry approach (FPI). The ORACLES experiment is used as a first validation test case.