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Eighth International Symposium on Turbulence and Shear Flow Phenomena
August, 28-30, 2013, Poitiers, Futuroscope, France

DOI: 10.1615/TSFP8

Validation of a Fractal Dynamic SGS Combustion Model by DNS of Turbulent Premixed Flame in Strong Shear Flow

pages 1-6
DOI: 10.1615/TSFP8.370
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要約

A fractal dynamic subgrid scale (SGS) combustion model for large eddy simulation (LES) of turbulent premixed combustion which was developed in our previous study (Yoshikawa et al., 2013) is evaluated through static tests on filtered data of direct numerical simulation (DNS) of H2−air turbulent V-shape premixed flame. The model is based on flamelet concept, fractal characteristics of turbulent premixed flames and scale separation in high Reynolds number turbulence and the accuracy has been demonstrated for freely propagating premixed flame in homogeneous isotropic turbulence (HIT). The results of the static tests validate that the present model has high accuracy and is applicable to conditions where strong mean shear exists and the interaction between flame and turbulence is complex. Furthermore, comparison with some conventional SGS combustion models indicates that the present model has superiority to these models in terms of accuracy.

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