In a three-dimensional boundary-layer flow, stationary so-called crossflow vortices appear, which can be described successfully by a linear stability theory. However, the transition of the laminar flow to a turbulent flow is governed by nonlinear interactions between stationary vortex structures and instationary disturbances. In order to incorporate such interactions into a transition model, the classical primary stability theory is extended by a theory of secondary instability. Here a new basic flow, which is composed of the three-dimensional boundary-layer flow plus a primary disturbance corresponding to the stationary crossflow vortices, is investigated locally for instability. Results of a secondary stability analysis for the flow over the swept DFVLR-F5 model wing show the importance of certain disturbances within the boundary layer, which are waves travelling preferably oblique to the potential flow direction.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Theoretical investigation of secondary instability of three-dimensional boundary-layer flows


    Weitere Titelangaben:

    Theoretische Untersuchung sekundaerer Instabilitaet von dreidimensionalen Grenzschichtstroemungen


    Beteiligte:
    Fischer, T.M. (Autor:in) / Dallmann, U. (Autor:in)

    Erschienen in:

    AIAA-Papers ; Jun ; 1-11


    Erscheinungsdatum :

    1987


    Format / Umfang :

    11 Seiten, 12 Bilder, 25 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch