Time resolved PIV analysis of flow over a NACA 0015 airfoil with Gurney flap

  title={Time resolved PIV analysis of flow over a NACA 0015 airfoil with Gurney flap},
  author={Daniel R. Troolin and Ellen Longmire and Wing T. Lai},
  journal={Experiments in Fluids},
A NACA 0015 airfoil with and without a Gurney flap was studied in a wind tunnel with Rec = 2.0 × 105 in order to examine the evolving flow structure of the wake through time-resolved PIV and to correlate this structure with time-averaged measurements of the lift coefficient. The Gurney flap, a tab of small length (1–4% of the airfoil chord) that protrudes perpendicular to the chord at the trailing edge, yields a significant and relatively constant lift increment through the linear range of the… 

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