The stability of two vortex pairs is analyzed as a model for the vortex system generated by an aircraft in flaps-down configuration. The co-rotating vortices on the starboard and port sides tumble about one another as they propagate downward. This results in a time-periodic basic state. The instabilities are periodic along the axes of the vortices with wavelengths that are large compared to the size of the vortex cores. The results show symmetric instabilities that are linked to the long-wavelength Crow instability. In addition, new symmetric and anti-symmetric instabilities are observed at shorter wavelengths. These instabilities have growth rates 60 - 100 % greater than the Crow instability. The system of two vortex pairs also exhibits transient growth which can lead to growth factors of 5 or 10 in one fourth of the time required for the same growth due to instability.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Stability of multiple trailing-vortex pairs


    Weitere Titelangaben:

    Stabilität der Mehrfach-Randwirbelpaare


    Beteiligte:
    Crouch, J.D. (Autor:in)


    Erscheinungsdatum :

    1996


    Format / Umfang :

    8 Seiten, 9 Bilder, 16 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Stability of Multiple Trailing-Vortex Pairs

    Crouch, J. D. / Advisory Group for Aerospace Research and Development; Fluid Dynamics Panel | British Library Conference Proceedings | 1996


    Turbulence in Trailing Vortex Pairs

    Devenport, W. / Zsoldos, J. / Vogel, C. et al. | British Library Conference Proceedings | 1994



    The turbulent decay of trailing vortex pairs in stably stratified environments

    Holzäpfel, Frank / Gerz, Thomas / Baumann, Robert | TIBKAT | 2000


    Trailing vortex hazard

    McGowan, W.A. | Engineering Index Backfile | 1968