Unsteady Reynolds-averaged Navier-Stokes simulations of the low-Reynolds-number flow past an SD7003 airfoil with combined plunge and pitch motion at Re = 60,000 are presented in which transition takes place across laminar separation bubbles. The numerical simulation approach includes transition prediction that is based on linear stability analysis applied to unsteady mean flow data. A parameter study for three reduced frequencies of k = 0.25, 0.5, and 1.0 is conducted. The drag losses encountered are quantified by a comparison with results using inviscid unsteady airfoil theory. High propulsive efficiencies are gained within the investigated thrust range, which goes to about 10 times the steady onflow airfoil drag.


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    Titel :

    Propulsive efficiency of a moving airfoil at transitional low Reynolds numbers


    Weitere Titelangaben:

    Antriebseffizienz eines beweglichen Tragflügels bei übergangsweise niedrigen Reynolds-Zahlen


    Beteiligte:
    Windte, Jan (Autor:in) / Radespiel, Rolf (Autor:in)

    Erschienen in:

    AIAA Journal ; 46 , 9 ; 2165-2177


    Erscheinungsdatum :

    2008


    Format / Umfang :

    13 Seiten, 26 Bilder, 46 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch






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