Estudio del ángulo de ataque de los álabes de un aerogenerador construido con scrap de tubos de Polietileno

Abstract

One of the most important aspects of the design of a wind turbine that uses wing profiles is to analyze the optimal angle of attack and its relationship with the Lift and Drag Coefficients (Cl and Cd), in order to optimize the performance of the profile used in the wind turbine for a given wind speed. In this work, this relationship is studied in a low power wind turbine installed in the Universidad Nacional de Tres de Febrero (UNTREF) Campus, in order to optimize its performance. These blades were built from scraps of high density polyethylene tubes, so the aerodynamic profile is not regulated, and due to the nature of the material with which they were built, the profile obtained is not constant along them. For this reason, 5 sections of the profile were analyzed using the Javafoil software, taken equidistantly along the blade obtaining the variation of the relation between Cl and Cd with the angle of attack, analyzed for the wind speed of the area. With an angle of attack of 11 ° it is possible to find the highest lift force with the least drag, so that the resulting force obtained will be the one that allows generating the higher power. In a complementary way, this method allows evaluating non-standardized wing profiles, such as the one used for the wind turbine installed in the UNTREF.