Trailing Edge Flap Effects on Dynamic Stall Vortex and Unsteady Aerodynamic Forces on a Pitching Airfoil

Figure 18

Normalized vorticity contours at different times during one pitching cycle for the two airfoils: (a, c, e) original airfoil and (b, d, f) TEF airfoil. The solid white line represents the contour line that the normalized vorticity is -10.