7 documents found, page 1 of 1
Aplicação de sistema de frenagem por correntes de Foucault a bancada de testes ...
Martins, Marcelo Albuquerque; Andrade, Carla Freitas de; Carneiro, Francisco Olimpio Moura; Rocha, Paulo Alexandre CostaO presente trabalho visou avaliar a aplicabilidade de um sistema de frenagem para uma bancada de testes de um laboratório didático de rotores eólicos, cujo atual sistema de frenagem é um freio a tambor. O sistema é um freio eletromagnético por efeito de correntes de Foucault, onde um eletroímã induz correntes elétricas sobre um disco de alumínio. Foi aplicado o modelo analítico desenvolvido por Wouterse (1991) ...
Peças cerâmicas fabricadas usando pó de granito com adição dos produtos da comb...
Pinheiro, Halisson de Souza; Nogueira, Ricardo Emílio Ferreira Quevedo; Xavier, Louise Caroline Peixoto; Lobo, Cândido Jorge de SousaThe technical feasibility of the use of granite residues as raw material in the manufacture of ceramic test specimens, with additions of the Coal Mineral Combustion (PCC's) products as a reforestation phase, was studied. The materials used were White Wing granite (RGAB) and Coal Combustion Products (PCC), in concentrations of 0% w / w, 5% w / w, 10% w / w, 15% w / P of PCCs. For a characterization of the raw ma...
Levantamento da curva de desempenho de aerogeradores de pequeno porte projetado...
Carneiro, Francisco Olimpio Moura; Rocha, Paulo Alexandre Costa; Silva, Maria Eugênia Vieira daThis work consisted in using the open source library of Computational Fluid Dynamics (CFD) OpenFOAM, to obtain the solution for a steady three-dimensional flow on small wind turbines, applying the RANS turbulence models k-ε and k-ω SST. Aiming to estimate the theoretical efficiency curve, values were calculated for the power coefficient at different tip speed ratios. The rotor has a diameter of 1.5 m and consis...
k–ω SST (shear stress transport) turbulence model calibration: A case study on ...
Rocha, Paulo Alexandre Costa; Rocha, Hélio Henrique Barbosa; Carneiro, Francisco Olimpio Moura; Silva, Maria Eugênia Vieira da; Bueno, André ValenteThis work deals with a computational investigation emphasized on the calibration of a turbulence model regarding to the operational capability of a SS-HAWT (small-scale horizontal axis wind turbine). Experimental field tests were carried out to collect data to evaluate the performance (power) coefficient, Cp, as a function of the tip-speed ratio, λ. The prototype examined was a three-bladed wind turbine (NACA (...
Montagem e testes de uma bancada para medição de desempenho de aerogeradores em...
Rocha, Paulo Alexandre Costa; Carneiro, Francisco Olimpio Moura; Lopes, Alberto dos Santos; Maia, Igor Albuquerque; Modolo, Angelo BezerraThe present article consists in the development of a new bench to measure the power curves of different wind turbine blades. The components were built and tested to assure adequate measurements and secure operation. The bench was used in the Wind Energy class of the Mechanical Engineering undergraduate and graduate programs. It allows the measurements of the power curves of different wind turbine blades. Using ...
Coupling aerodynamic loading to structural analysis of wind turbines through nu...
Maia, Igor Albuquerque; Silva Júnior, Francisco Ilson da; Rocha, Paulo Alexandre Costa; Carneiro, Francisco Olimpio MouraStructural analysis of wind turbine blades is essential to design the other components of the turbine. In this context, the study of the loads imposed by the wind is necessary, since the choice of aerodynamic factors is determined by structural constraints. This work was carried out aiming to study the fluid-structure interaction in a micro-scale wind turbine through computational simulation, in order to obtain...
Levantamento de curvas de eficiência de aerogeradores de 3m de diâmetro utiliza...
Carneiro, Francisco Olimpio MouraA survey was conducted, consisting of efficiency curves applying RANS turbulence numerical models of one and two equations for a wind turbine with a diameter of 3m, using blades designed to operate under different λ with NACA 0012, 4412 and 6412 profiles. The parameterization of the mesh geometry to the size of the rotor, together with the parameterization of the refinement level compared to the ability of RANS...