Figure 7. Lift-to-drag ratio (𝐶L/𝐶D) versus angle of attack (α) for Baseline airfoil, Static Extended Trailing Edges (SETE), and Gurney Flaps (GF) under steady and unsteady flow

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