Unsteady boundary-layer separation from an Eppler 387 airfoil at low Reynolds number is studied numerically. Through a series of computations, the effects of Reynolds number and angle of attack are investigated. For all cases, vortex shedding is observed from the separated shear layer. From linear stability analysis, a Kelvin-Helmholtz instability is identified as causing shear layer unsteadiness. The low-turbulence wind-tunnel tests of the Eppler 387 airfoil are used to compare with the time-averaged results of the present unsteady computations. The favorable comparison between computational and experimental results strongly suggests that the unsteady large-scale structure controls the low-Reynolds-number separation bubble reattachment with small-scale turbulence playing a secondary role.


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    Titel :

    Low-Reynolds-number separation on an airfoil


    Weitere Titelangaben:

    Grenzschichtablösung an einer Tragfläche bei geringen Reynoldszahlen


    Beteiligte:
    Muti Lin, J.C. (Autor:in) / Pauley, L.L. (Autor:in)

    Erschienen in:

    AIAA Journal ; 34 , 8 ; 1570-1577


    Erscheinungsdatum :

    1996


    Format / Umfang :

    8 Seiten, 9 Bilder, 3 Tabellen, 33 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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    Low-Reynolds-number separation on an airfoil

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