EVALUATION OF TURBULENCE MODELLING FOR THE INCOMPRESSIBLE FLOW SIMULATIONS AROUND A MULTI DELTA WING CONFIGURATION
Résumé
In the present work, the numerical simulations of flow around a fighter aircraft at several angles of attack and two sideslip angles are performed with the flow solver ISIS-CFD which is an incompressible unsteady Reynolds-averaged Navier-Stokes method. Three RANS-based turbulence models, as the isotropic kω SST, the non-linear anisotropic EARSM and the Reynolds stress transport model SSGLRR-ω and one hybrid RANS-LES model, the DDES-SST, are used. All these turbulence models are based on k-ω model. Forces and moments as well as flow field data are compared with experimental measurements. For the RANS-based turbulence models, the results obtained with k-ω SST agree relatively well with the experimental data and it is the better approach for this class of turbulence models. However, the results obtained with DDES-SST are in better agreement with experiments.
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