Caracterización del ruido aerodinámico en generadores eólicos de eje horizontal mediante análisis computacionales.

Abstract

Noise reduction in wind generators is of vital importance due to its wide applicability, the increase in its use due to climate change, the high costs of fossil fuels for the generation of electricity and the possible hearing effects in humans caused by noise. continuous exposure to noise. That is why this work consists of a methodology based on existing bibliography for aerodynamic noise reduction using CFD and FW&H computational tools. To reduce noise, first a reference wind turbine was taken, coupling WORTMANN FX 60-126, SG043 and SG042 aerodynamic profiles. Simulating and calculating the noise produced to later make two design proposals for the reduction of aerodynamic noise. Followed by the procedure to obtain the sound levels with the same values of the reference wind turbine in which a significant noise reduction was obtained. But sacrificing torque in one of the design proposals. Noise levels were obtained by CFD and FW&H simulations with a standard k-ϵ viscosity model. The reduction of the aerodynamic noise produced by the design proposals was carried out by means of a little-seen methodology which briefly consists of adding spines similar to the teeth of a shark. At the trailing edge of the blade, decreasing the detachment of the boundary layer.