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Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

Statistical behaviour of the curvature term of the FSD transport equation in the context of RANS

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1190
pages 1147-1158

M. Katragadda
School of Mechanical and Systems Engineering, Newcastle University, Claremont Road, Newcastle-Upon-Tyne, NE1 7RU

S. P. Malkeson
MMI Engineering Ltd., The Brew House, Wilderspool Park, Greenall’s Avenue, Warrington, Cheshire, WA4 6HL

Resumo

A Direct Numerical Simulation (DNS) database of freely propagating statistically planar turbulent premixed flames with a range of different turbulent Reynolds number Ret, has been used to analyse the statistical behaviour of the curvature term of the Flame surface Density (FSD) transport equation in the context of Reynolds Averaged Navier Stokes (RANS) simulations. The simulation parameters were chosen to represent the thin reaction zones regime combustion and the variation of Ret was brought about by modifying the Karlovitz and the Damköhler numbers independently of each other. The curvature term was decomposed into the components arising from the different components of displacement speed, and their statistical behaviours have been analysed in detail. The effects of Ret on the statistical behaviours of the different components of the curvature term need to be accounted for in the models for the FSD curvature term in the context of RANS simulations.

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