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NUMERICAL PREDICTION OF TRANSONIC BUFFETING BY MEANS OF STANDARD AND TIME-DEPENDENT TURBULENT MODELS

E. Orlik
ICARE-CNRS 1C avenue de la Recherche Scientifique, F-45071 Orleans cedex 2, France

Nicolas Mazellier
Laboratoire PRISME, Universite d'Orleans, 8, rue Leonard de Vinci, 45071 Orleans cedex 2, France

Azeddine Kourta
Univ. Orleans, INSA-CVL, PRISME EA 4229, F45072, Orleans, France

要約

We present the preliminary results from a numerical investigation of transonic buffeting on an OAT15A airfoil using the two-equation transport models k-ω SST and k-ε with low-Re corrections by means of damping functions. The influence of the turbulence model, the transition and 3D configurations onto the physics of the buffeting are presented. Even though shock-induced oscillations are observed, some discrepancies with experimental results are found. A refined model of turbulent viscosity, based on a semi-deterministic approach, is proposed and is currently implemented in the computational software and used in order to improve the buffeting prediction.