A seven-hole flow-angularity pressure probe was used to assess the effectiveness of vortex unwinding in a turbulent boundary layer. The vortex center moved in the spanwise and vertical direction with increasing longitudinal distance. Initially, the vortex moved rapidly; it achieved 60 percent of its total 41 mm spanwise travel before it had completed half of its travel in the longitudinal direction. The flow was studied behind the single vortex combined with the most successful unwinder. The unwinder was found to be very effective in reducing the amount of secondary flow in the boundary layer.


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    Title :

    Three-dimensional mean flow experimental study of 'vortex unwinding'


    Contributors:

    Conference:

    AIAA, ASME, SIAM, and APS, National Fluid Dynamics Congress ; 1988 ; Cincinnati, OH, United States


    Publication date :

    1988-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





    Vortex unwinding in a turbulent boundary layer

    Mcginley, Catherine B. / Beeler, George B. | NTRS | 1987


    Vortex unwinding in a turbulent boundary layer

    MCGINLEY, CATHERINE B. / BEELER, GEORGE B. | AIAA | 1987