Study of the Dynamics of the Nature Inspired Turbine Blade

Blade is the most significant part in the wind generator. The windmill used in wind power generation is a turbine, which rotates with high angular velocity. Due to the great amount of centrifugal force applied to the blade during rapid rotation, the shape of the blade is crucial for its efficiency. In addition, accuracy of the balance between blades should be improved. The ideal shape of the wind turbine, as with maple seeds falling in spiral motion, can be found in nature. Although each maple seed embraces a unique shape, all fall with continuous spiral motion. Therefore, establishing a relationship between the shape of maple seeds leads to a universal design of wind turbines. A few of the blade shapes developed by National Advisory Committee for Aeronautics(NACA 4412-4418) were used for the simulations. There was no significant difference of coefficient of lift due to difference in thickness, but coefficient of drag was increased as the thickness was increased. Also the relations between Coefficient of drag vs. Coefficient of lift has been found for the NACA 4412-4418. This paper uses computational software to design a wind turbine considering angle of attack, speed and density of the wind, and shapes of blade.