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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Large-Eddy Simulation of Transonic Buffet over a Supercritical Airfoil
verfasst von : E. Garnier, S. Deck
Erschienen in: Turbulence and Interactions
Verlag: Springer Berlin Heidelberg
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The transonic buffet is an aerodynamic phenomenon that results in a large-scale self-sustained periodic motion of the shock over the surface of the airfoil. The time scale associated to this motion is much slower than the one of the wall bounded turbulence. It is then an appropriate case for URANS approaches and first attempts with these methods have been reasonably successful in reproducing the mean features of such flows. Nevertheless, as shown by Thiery and Coustols [2] results are very sensitive to the turbulence model. Moreover, with some models, it is necessary to increase the angle of attack with respect to experiment to obtain an unsteady flow.