Abstract
Development of the flow in the near wake region of a NACA0012 wing has been investigated. The profiles of three components of mean velocity, time-averaged vorticity and turbulent kinetic energy are evaluated by multi-position technique with an X-type hotwire probe at three different streamwise locations. The existence of an wing tip vortex is apparent in the profile of tangential velocity, and the axial velocity dificit is also clearly observed. As measurement location goes toward downstream, streamwise velocity deficit recovers, the peak value of vorticity decreases, and the turbulent kinetic energy at the center of the vortex increases. These results indicate the wing tip vortex begins to attenuate in the very near wake region of the wing, and this might be caused by the effect of low Reynolds number and high free stream turbulence.
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