par Evans, Michael M.J.;Medwell, Paul Ross;Parente, Alessandro 
Référence 17th International Conference on Numerical Combustion(6-8 May 2019: Aachen, Germany)
Publication Publié, 2019-05-08
Référence 17th International Conference on Numerical Combustion(6-8 May 2019: Aachen, Germany)
Publication Publié, 2019-05-08
Abstract de conférence
| Résumé : | Numerical predictions of practical, large-scale combustion systems require computationally efficient modelling of both the fluid mechanics and turbulence-chemistry interactions. The latter is particularly critical under conditions with low turbulent Reynolds number and Damköhler number of order unity, such as in distributed combustion regimes. This includes flameless, moderate or intense low oxygen dilution (MILD) and colourless combustion. One approach to modelling distributed combustion in practical systems is to use a Reynolds-averaged approach for the flow-field, incorporating reduced, finite-rate chemical kinetics with the eddy dissipation concept (EDC) reaction model. Key assumptions about the scale of the reaction zones, however, break-down in such regimes. This presentation will highlight these short-comings, detail recently proposed modifications to the EDC model and provide an overview of some of the current work being done to further improve the EDC model for predicting distributed combustion using Reynolds-averaged modelling. |
