Abstract
This paper describes some aspects of our effort to analyze turbulent combustion on the basis of an extension of the coherent flame model initially proposed by Marble and Broadwell.
At this stage the model comprises a local description (flamelets) and a global representation of the turbulent flow-field including a balance equation for the mean flame area per unit volume.
The flamelets are non-adiabatic premixed strained flames, a model suggested by Libby, Linan and Williams. Complex chemistry calculations have been carried out for a large number of propane-air flames and a large data-base of flamelets is being constructed. These calculations provide consumption rates, extinction and ignition characteristics which ere used in the global turbulent calculation to model the mean reaction terms. Numerical results obtained for turbulent premixed flames stabilized in a duct are discussed.
Experiments performed on a model combustor provide distributions of the mean heat release rate. These distributions are compared with those determined numerically. This comparison indicates that the coherent flame description accounts for important features found in the experiment.
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Darabiha, N., Giovangigli, V., Trouvé, A., Candel, S.M., Esposito, E. (1989). Coherent Flame Description of Turbulent Premixed Ducted Flames. In: Borghi, R., Murthy, S.N.B. (eds) Turbulent Reactive Flows. Lecture Notes in Engineering, vol 40. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-9631-4_29
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DOI: https://doi.org/10.1007/978-1-4613-9631-4_29
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