LES/CMC of blow-off in a liquid fueled swirl burner

Large Eddy Simulations of two-phase combustion with the Conditional Moment Closure subgrid model have been performed for flow conditions corresponding to stable and blow-off regimes in a swirl heptane spray burner. In the case of stable flame (i.e. low velocity), the predicted location and shape of the flame agree well with high-speed camera images from an experiment. Using model constants previously calibrated against pilot jet flame with localised extinction, we obtain that at the experimentally determined blow-off velocity, the predicted flame also blows-off, demonstrating that the LES/CMC can capture global extinction of a realistic flame