Modelagem multifísica de uma unidade geradora hidroelétrica

• Ano de defesa: 2024
• Autor(a) principal: Sicchieri, Leonardo Campanine
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; Brasil; Programa de Pós-graduação em Engenharia Mecânica
• Palavras-chave em Português: Modelo multifísico; Multiphysics model; Unidade geradora hidroelétrica; Hydroelectric generating unit; Metamodelos Kriging; Kriging surrogates; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOS; Engenharia Mecânica; Usinas hidrelétricas; Modelos matemáticos; ODS::ODS 7. Energia limpa e acessível - Garantir acesso à energia barata, confiável, sustentável e renovável para todos.; ODS::ODS 9. Indústria, Inovação e infraestrutura - Construir infraestrutura resiliente, promover a industrialização inclusiva e sustentável, e fomentar a inovação.
• Link de acesso: https://repositorio.ufu.br/handle/123456789/42037; http://doi.org/10.14393/ufu.te.2024.503

This work is dedicated to the development of a multiphysics model of a hydroelectric generating unit (GU), in which the shaft is represented by finite elements considering a Timoshenko beam with six degrees of freedom per node. The hydrodynamic bearings are modeled by solving the Reynolds equation and the energy equation using the finite volume method. The electromagnetic forces acting on the generator are determined through finite element simulations, solving Maxwell's equations. To represent the hydraulic forces acting on the turbine, results from CFD (Computational Fluid Dynamics) simulations are used, employing the immersed boundary method in conjunction with Large Eddy Simulation. In assembling the complete multiphysics model, with the aim of reducing computational costs and allowing the simulation of various operating conditions, it is opted to represent the supporting forces of the hydrodynamic bearings and the electromagnetic forces of the generator through Kriging surrogates. The multiphysics model is adjusted to represent the generating unit (GU) of Foz do Chapecó, where, upon comparing the vibration amplitudes measured in the GU with the numerical results, a good similarity is observed between them, with errors less than 7%.