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AN ALGEBRAIC MODEL CLOSURE OF THE COUNTER GRADIENT DIFFUSION FOR THE TURBULENT FLUXES IN THEIR COMBUSTION SIMULATION

DOI: 10.1615/ICHMT.2015.IntSympAdvComputHeatTransf.550
pages 648-665

Ahmed Neche
Aeronautics Department, Faculty of Technology, University Saad Dahlab of Blida, Road of Soumaa, Blida, Algeria; Department of Fluid, Thermal and Combustion Sciences, Pprime Institute (UPR 3346), PO Box 30179, Futuroscope, Chasseneuil Cedex, France

Zineddine Youbi
Aeronautics Department, Faculty of Technology, University Saad Dahlab of Blida, Road of Soumaa, Blida, Algeria

Resumo

This paper will present an algebraic model closure of counter gradient diffusion for the turbulent fluxes. The combustion will occur in a variable equivalence ratio and as partially premixed combustion is highlighted as one of the most relevant and important modeling challenges in the field of turbulent premixed combustion, we will use the LW-P model of combustion for this situation. The resulting model is combined with the second order model of turbulence Rij - ε in order to well predict the main structure of the flame zone in the case of stagnating turbulent flames. A numerical simulation is carried out in order to validate the model. The computational results are validated against the experimental measurements done by Cheng and Shepherd [1991].
The comparison of the results with the measurements were showing remarkable consistency and indicates that the model is a valid approach for predicting partially turbulent premixed flames stabilized in a stagnation flow.

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