The dynamic interactions of aircraft wake vortices are investigated using both inviscid and viscous models. The phenomenon of vortex merging resulting in the rapid aging of a vortex wake is examined in detail. It is shown that the redistribution of vorticity from convection and diffusion during merging is a mechanism effective in reducing the hazard of a wake. Inviscid computations show that the merging phenomenon may be sensitive to small changes in spanwise load distribution and that the fuselage vortex shed from the wing-fuselage junction can play a significant role in promoting merging of wing-tip and flap vortices. Vortex-wake-merging computations using a second-order closure model of turbulent transport indicate that a low-hazard wake occurs when the generating aircraft flap and wing-tip vortices of the same strength and sign. This optimum is achieved when the flap vortex is located outboard approximately 40% of the distance to the tip vortex.


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    Title :

    Vortex interactions and decay in aircraft wakes


    Contributors:

    Published in:

    Publication date :

    1977-02-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Vortex interactions and decay in aircraft wakes

    BILANIN, A. J. / TESKE, M. E. / WILLIAMSON, G. G. | AIAA | 1977


    Vortex interactions and decay in aircraft wakes

    Bilanin, Alan J. | TIBKAT | 1977