Computational Investigation of a Swirled Premixed Burner Using Hybrid RANS-LES Method

Z. Mansouri (1) , T. Boushaki (1) , M. Aouissi (2) , I. Gökalp (1)

1 ICARE - Institut de Combustion, Aérothermique, Réactivité et Environnement
2 Université Amar Telidji - Laghouat

High turbulent swirling reacting flow is investigated in a swirled premixed burner using hybrid RANS-LES method. The hybrid method is the Detached Eddy Simulation (DES) and it is combined with the Finite-Rate/Eddy Dissipation (FR/EDM) combustion model to treat turbulence-chemistry interaction. The instantaneous flow fields are well captured by DES and the premixed flame is well reproduced by FR/EDM. It is shown that DES is capable to reproduce the experimental profiles of the mean axial velocity and temperature. Phase-angle analysis of the instantaneous flow field shows the presence of large-scale coherent structures. Q-criterion is used to visualize the 3D behaviour of the structures; it is found that the unsteady flow contains a Precessing Vortex Core (PVC) and Secondary Outer Vortex (SOV).

Mots clés: RANS-LES Method; DES; Turbulent swirling flow

Domaines: Milieux fluides et réactifs

Z. Mansouri, T. Boushaki, M. Aouissi, I. Gökalp. Computational Investigation of a Swirled Premixed Burner Using Hybrid RANS-LES Method. Progress in Hybrid RANS-LES Modelling, pp.243-254, 2018, 978-3-319-70031-1. ⟨10.1007/978-3-319-70031-1_20⟩. ⟨hal-02270955⟩