Desarrollo de prototipo de generación eléctrica eólica por medio de movimientos oscilantes

Abstract

The design of a wind power generation prototype that works by means of oscillating movements was carried out. Through the QFD design methodology, it was possible to analyze the viability of the product, to later and through a bibliographic review, propose 5 alternatives of the electricity generating device, which were studied computationally to predict the behavior of a functional non-conventional wind turbine. through oscillating movements, verifying the effect caused by the air on the body of the wind turbine in fluid dynamic simulations (ANSYS-Fluent Software) and structural resistance of elements (ANSYS-Mechanical-Structural). A wind turbine prototype was obtained generating a low drag coefficient and good structural behavior. It began with several conceptual alternatives for wind turbines, reviewing previous research, then a three-dimensional computational fluid dynamics (CFD) study was carried out under steady flow conditions, since a turbulent condition implies a higher computational cost. The fluid dynamic simulations were carried out with air as fluid (V=7,361 m/s as average speed in a massive passenger transport fleet in Colombia). The k-ω SST (Shear-Stress-Transport) turbulence model was selected due to the nature of the fluid, a suggestion from previous studies on simulation of bladeless wind turbines. In the CFD study of the alternatives, it is evident that one of these prototypes generates a low drag coefficient (0.73) compared to other proposals, indicating suitability for the future application of the wind turbine. The structural simulations were carried out under a condition of combined loads, obtaining a stationary pressure profile on the faces of the wind turbine through CFD simulations and applying an oscillating pressure value (Fr= 634.167 Hz). The final structure of the wind turbine is made up of Nylon-6, galvanized and structural steel. The FEM study reveals maximum deformation in the vibrating plate (3.19 mm) allowing deformation and energy generation through the plates of piezoelectric material. Keywords: Vortex Induced Vibration (VIV), Computational Fluid Dynamics (CFD), structural analysis, Energy Harvesting, piezoelectric, non-rotating wind turbine.