Bionic Design of Wind Turbine Blade Based on Long-Eared Owl’s Airfoil

Figure 18

The velocity vectors colored by velocity magnitudes at Re = 8 × 10⁴ at different angles of attack.

(a) Standard airfoil at AOA = 10°

(b) Bionic airfoil at AOA = 10°

(c) Standard airfoil at AOA = 15°

(d) Bionic airfoil at AOA = 15°

(e) Standard airfoil at AOA = 20°

(f) Bionic airfoil at AOA = 20°