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LES/CMC simulations of swirl-stabilised ethanol spray flames approaching blow-off

DOI: 10.1615/ICHMT.2015.THMT-15.1000
pages 479-482

A. Giusti
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK

Epaminondas Mastorakos
Hopkinson Laboratory, Department of Engineering, University of Cambridge, Cambridge, CB2 1PZ, UK

Résumé

Large Eddy Simulations (LES) with the Conditional Moment Closure (CMC) combustion model of swirling spray flames have been performed in conditions close to blow-off for which a wide database of experimental measurements is available for both flame and spray characterization. The solution of CMC equations exploits a three-dimensional unstructured code with a first order closure for chemical source terms. It is shown that LES/CMC is able to properly capture the flame structure at different conditions and agrees reasonably well with the measurements both in terms of mean flame shape and dynamic behaviour of the flame evaluated in terms of local extinctions and lift-off height. The sensitivity of the simulation results to the various boundary conditions is discussed.

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