Flow control study of a NACA 0012 airfoil with a Gurney flap was carried out in a wind tunnel, where it was demonstrated that a dielectric-barrier-discharge (DBD) plasma actuator attached to the flap could increase the lift further, but with a small drag penalty. Time-resolved PIV measuremen...
Figure 6a compares the present data on NACA 0012 to show DCL as a function of h/c at zero angle of attack, indicating that the lift incre- ments by Gurney flaps is given by DCL = 1.5Hh/c. Also shown in Fig. 6a are the data obtained by Bechert et al. (2000) on an HQ17 ...