Due to the trend in the design of modern aeroengines to reduce weight and to realize high pressure ratios, fan and first stage compressor blades are highly susceptible to flutter. At operating points with transonic flow velocities and high incidences stall flutter might occur involving strong shock-boundary layer interactions, flow separation and oscillating shocks. In this paper, results of unsteady Navier-Stokes flow calculations around an oscillating blade in a linear transonic compressor cascade at different operating points including near stall conditions are presented. The nonlinear unsteady Reynolds-averaged Navier-Stokes equations are solved time-accurately using implicit time-integration. Different Low-Reynolds-Number turbulence models are used for closure. Furthermore, empirical algebraic transition models are applied to enhance the accuracy of prediction. Computations are performed two-dimensionally as well as three-dimensionally. It is shown that, for the steady calculations, the prediction of the boundary layer development and the blade loading can be substantially improved compared with fully turbulent computations when algebraic transition models are applied. Furthermore, it is shown that the prediction of the aerodynamic damping in the case of oscillating blades at near stall conditions can be dependent on the applied transition models.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Unsteady Navier-Stokes simulation of a transonic flutter cascade near stall conditions applying algebraic transition models


    Weitere Titelangaben:

    Instationäre Navier-Stokes-Simulation der fast überzogenen Flugzustände einer transsonischen Flatterkaskade mit Hilfe algebraischer Übergangsmodelle


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2005


    Format / Umfang :

    12 Seiten, 12 Bilder, 4 Tabellen, 36 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Unsteady Navier-Stokes Simulation of Low-Reynolds Stall Flutter

    Yabili, Sacha / Smith, Marilyn / Dimitriadis, Grigorios | AIAA | 2012


    Unsteady Navier-Stokes Simulation of Low-Reynolds Stall Flutter

    Yabili, S. / Smith, M. / Dimitriadis, G. et al. | British Library Conference Proceedings | 2012



    Navier-Stokes Computations of the Flow through the NASA-GRC Transonic Flutter Cascade

    Whitlow, D. / Capece, V. / Jones, K. et al. | British Library Conference Proceedings | 2006