Wind-tunnel measurements were used to identify and characterize the low-frequency oscillation present in the flowfield about an NACA 0012 airfoil with a horn-ice shape. This low-frequency mode was identified in the unsteady content of the airfoil lift coefficient and the corresponding Strouhal numbers compared well with those reported in the literature. To study the relationship between the ice-induced separation bubble dynamics and the airfoil circulation, the unsteady shear-layer reattachment location was determined using measurements from a surface-mounted hot-film array. At the low-frequency mode, the lift coefficient led the reattachment location by a phase of π/2. Additional characterization of the relationship between the unsteady shear-layer reattachment location and the unsteady airfoil pressure distribution was also completed, along with an analysis of the convective qualities of the low-frequency oscillation throughout the airfoil pressure distribution. Presented as Paper 2013-2673 at the 31st Applied Aerodynamics Conference, San Diego, CA, 24-27 June 2013


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    Titel :

    Characterization of Low-Frequency Oscillations in the Flowfield About an Iced Airfoil



    Erschienen in:

    AIAA journal ; 53 , 3 ; 629-637


    Erscheinungsdatum :

    2015




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :

    Klassifikation :

    BKL:    50.93 / 55.50 Luftfahrzeugtechnik / 50.93 Weltraumforschung / 55.60 Raumfahrttechnik / 55.50 / 55.60
    Lokalklassifikation TIB:    770/7040




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    Gurbacki, H. M. / Bragg, M. B. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2004


    Automatic grid generation for iced airfoil flowfield predictions

    CARUSO, STEVEN / FARSHCHI, MOHAMMAD | AIAA | 1992