Strained laminar flamelet calculations of premixed turbulent combustion in a closed vessel

A new turbulent burning rate model for premixed combustion is described. The model assumes that all chemical reaction takes place in thin laminar flamelets which are subjected to strain by the turbulent flow field. The effects of a distribution of strain and possible flamelet extinction on the turbulent burning rate are modelled analytically. The burning rate expression is implemented in an existing turbulent combustion code describing transient combustion in closed vessels, via a development of the Bray-Moss-Libby model, and comparison are made with previous results obtained using a conventional eddy-break-up rate expression.

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