Modern turbofan engines employ a highly loaded fan stage with transonic or low-supersonic velocities in the blade-tip region. The fan blades are often prone to flutter at off-design conditions. Flutter is a highly undesirable and dangerous self-excited mode of blade oscillations that can result in high-cycle fatigue blade failure. The origins of blade flutter are not fully understood yet. The latest view is that the blade oscillations are triggered by high-frequency changes in the extent of the partially separated area on the airfoil suction side. There is a lack of experimental data describing the separated flow characteristics of modern airfoils for transonic fans.


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    Titel :

    Complex Flow Separation Pattern on Transonic Fan Airfoils Revealed by Flow Visualization


    Beteiligte:
    J. Lepicovsky (Autor:in)

    Erscheinungsdatum :

    2001


    Format / Umfang :

    2 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Transonic flow about airfoils

    Bauer, F. / Garabedian, P. / Jameson, A. et al. | NTRS | 1978


    Inviscid transonic flow over airfoils

    MAGNUS, R. / YOSHIHARA, H. | AIAA | 1970


    Inviscid transonic flow over airfoils

    MAGNUS, R. / YOSHIHARA, H. | AIAA | 1970