Mejora del rendimiento del álabe de un aerogenerador de baja potencia y velocidad mediante dispositivos de control de capa límite.

Abstract

This work is about the design and optimization of the blade of a three-blade horizontal axis wind turbine for low speed and low power. The design of the blade begins with the selection of aerodynamic profiles with better aerodynamic performance in the Reynolds 9X104 number range through the use of XFOIL and XFLR5 software. The best aerodynamic performance is determined by the maximum relationship between lift and drag, which will define the angle of attack of the wind on the blade. Subsequently, the geometric characteristics of the blade (rope and angle of rotation) are determined with a subsequent optimization of the axial induction and rotation factors. Once the blade geometry is defined, the CAD design of the blade and the generator is performed in order to evaluate its performance through ANSYS Fluent software. The optimization of the blade is carried out through the use of limit layer control devices and having the power coefficient as an optimization parameter. The results show us that the best device is the triangular counter-rotation configuration which gives a 5% improvement in the power coefficient.