Figure 1. (a) Cross-section of the NACA 0012 airfoil, (b) NACA 0012 airfoil with a static extended trailing edge (SETE), and (c) NACA 0012 airfoil with a Gurney flap

From

Numerical Investigation of a NACA 0012 Airfoil with Static-Extended Trailing Edges and Gurney Flaps for Low-Reynolds-Number Wind Turbine Applications

Tiberius S. Gikenyi, Churchill O. Saoke, Joseph N. Kamau

American Journal of Energy Research. 2025, 13(3), 86-95 doi:10.12691/ajer-13-3-2