A delayed detached-eddy simulation of the transonic buffet over a supercritical airfoil is performed. The turbulence modeling approach is based on a one-equation closure, and the results are compared to an unsteady Reynolds-averaged Navier–Stokes simulation using the same baseline model as well as experimental data. The delayed detached-eddy simulation successfully predicts the self-sustained unsteady shock-wave/boundary-layer interaction associated with buffet. When separation occurs, the flow exhibits alternate vortex shedding and a spanwise undulation. The method also captures secondary fluctuations in the boundary layer that are not predicted by unsteady Reynolds-averaged Navier–Stokes simulation. A map of flow separation emphasizes the differences between the delayed detached-eddy simulation and unsteady Reynolds-averaged Navier–Stokes flow topologies. Statistical pressure distributions and velocity profiles help assess the performance of each model. They indicate that the delayed detached-eddy simulation tends to overestimate the flow unsteadiness near the trailing edge. Instantaneous distributions of Reynolds-averaged Navier–Stokes and large-eddy simulation regions during buffet show that the delayed detached-eddy simulation enforces Reynolds-averaged Navier–Stokes mode near the airfoil even when the boundary layer gets very thick.


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    Titel :

    Prediction of Transonic Buffet by Delayed Detached-Eddy Simulation


    Beteiligte:
    Grossi, Fernando (Autor:in) / Braza, Marianna (Autor:in) / Hoarau, Yannick (Autor:in)

    Erschienen in:

    AIAA Journal ; 52 , 10 ; 2300-2312


    Erscheinungsdatum :

    2014-04-09


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch







    Zonal-Detached Eddy Simulation of Transonic Buffet on a Civil Aircraft Type Configuration

    Brunet, V. / Deck, S. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2008