Construção de pás com perfil NREL S809 utilizando moldagem em borracha de silicone

Abstract

Tests made in wind tunnels are of extreme importance to the aerodynamic study of certain profiles. From them it can be found a profile with ideal characteristics for the intended goal. The Laboratory of Aerodynamic and Mechanics of Computational Fluids (LAERO) of the Federal University of Ceara performs constantly such tests with prototypes produced in a 3d printer, obtaining relevant information for its researches. However, the raw material used has a high price and it has bad accessibility. Furthermore, in this context, the work has as objective an alternative to the construction of the prototypes that I lowered the prices of the costs related to the construction, making a comparison between the results of the tests made in the current and the proposed model. A CNC milling machine belonging to LAERO was used in the development of the prototype, which reduced the production costs, since it can machining an infinit of materials. It was also used as a casting technique in silicon rubber, based on the limitations of the milling cutter. To the production of the shovels, it was used crystal polyester resin, due to its ease of handling and low cost. The results showed that the manner of production by machining and casting are equivalent to the produced in the 3d printer. In that way it is possible to have reliability in the presented method.