Navier–Stokes simulations are performed to determine the responses of a single-degree-of-freedom pitch airfoil system, as well as those of a two-degree-of-freedom pitch-and-heave system, in buffeting flows. The buffeting flow exhibits shock-wave oscillations of a unique frequency that occurs for some combinations of mean flow angle of attack and transonic Mach numbers. It was found that frequency lock-in may occur, when the frequency of the elastic system is close to the buffet frequency, and the amplitude of the elastic oscillation is above some threshold. Following frequency lock-in, the system response rapidly increases until reaching a limit-cycle oscillation. Synchronization of the transonic aerodynamic buffet phenomenon and the structural elastic modes provides a physical mechanism that leads to a limit-cycle oscillation, as observed in the current computational study.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Aeroelastic Responses of Elastically Suspended Airfoil Systems in Transonic Buffeting Flows


    Beteiligte:

    Erschienen in:

    AIAA Journal ; 52 , 5 ; 926-934


    Erscheinungsdatum :

    2014-03-26


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Aeroelastic Responses of Spring-suspended Airfoil Systems in Transonic Buffeting Flows

    Raveh, D. / Dowell, E. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2012



    Airfoil Unsteady Aeroelastic Responses in Buffeting Transonic Flows

    Raveh, D. | British Library Conference Proceedings | 2009