Flutter analyses were developed to predict the onset of supersonic unstalled flutter of a cascade of two-dimensional airfoils. The first of these analyzes the onset of supersonic flutter at low levels of aerodynamic loading (i.e., backpressure), while the second examines the occurrence of supersonic flutter at moderate levels of aerodynamic loading. Both of these analyses are based on the linearized unsteady inviscid equations of gas dynamics to model the flow field surrounding the cascade. These analyses are utilized in a parametric study to show the effects of cascade geometry, inlet Mach number, and backpressure on the onset of single and multi degree of freedom unstalled supersonic flutter. Several of the results are correlated against experimental qualitative observation to validate the models.


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    Title :

    Supersonic Unstalled Flutter


    Contributors:

    Publication date :

    1978


    Size :

    24 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Supersonic unstalled flutter

    Adamczyk, J. J. / Goldstein, M. E. / Hartmann, M. J. | NTRS | 1978


    Supersonic unstalled flutter

    Adamczyk, J. J. / Goldstein, M. E. / Hartmann, M. J. | NTRS | 1978


    Experimental Modeling of Unstalled Supersonic Turbofan Flutter

    Ronald E. Riffel / Sanford Fleeter | AIAA | 1981