Design of wind-turbine blades for improving aerodynamic performance using hybrid blades

Worldwide Research Trends on Optimizing Wind Turbine Efficiency

“…These forces are important in the aerodynamic analysis of wind turbine blades, such as the analysis performed by Oukassou et al [8], who evaluated an airfoil with different Reynolds numbers and found the optimal chord dimension and angle of attack. An interesting proposal is hybrid blades, such as the one proposed by Yen et al [9], who used several flows with different Reynolds numbers and different angles of attack; in this study they were able to increase the lift coefficient to twice the normally measured ones. Hasham Ali et al [10] proposed lift and drag coefficients for low speeds on vertical axis wind turbines to identify the best airfoil; they identified that for low speeds the angle of attack should be changed from 0 • to 15 • .…”