Numerical study of wake characteristics in a horizontal-axis hydrokinetic turbine

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorSilva, Paulo Augusto Strobel Freitas e-
Autor(es): dc.creatorOliveira, Taygoara Felamingo de-
Autor(es): dc.creatorBrasil Júnior, Antônio César Pinho-
Autor(es): dc.creatorVaz, Jerson R. P.-
Data de aceite: dc.date.accessioned2021-10-14T17:54:18Z-
Data de disponibilização: dc.date.available2021-10-14T17:54:18Z-
Data de envio: dc.date.issued2017-12-07-
Data de envio: dc.date.issued2017-12-07-
Data de envio: dc.date.issued2016-10-
Fonte completa do material: dc.identifierhttp://repositorio.unb.br/handle/10482/29988-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/0001-3765201620150652-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/618928-
Descrição: dc.descriptionOver the years most studies on wake characteristics have been devoted to wind turbines, while few works are related to hydrokinetic turbines. Among studies applied to rivers, depth and width are important parameters for a suitable design. In this work, a numerical study of the wake in a horizontal-axis hydrokinetic turbine is performed, where the main objective is an investigation on the wake structure, which can be a constraining factor in rivers. The present paper uses the Reynolds Averaged Navier Stokes (RANS) flow simulation technique, in which the Shear-Stress Transport (SST) turbulent model is considered, in order to simulate a free hydrokinetic runner in a typical river flow. The NREL-PHASE VI wind turbine was used to validate the numerical approach. Simulations for a 3-bladed axial hydrokinetic turbine with 10 m diameter were carried out, depicting the expanded helical behavior of the wake. The axial velocity, in this case, is fully recovered at 12 diameters downstream in the wake. The results are compared with others available in the literature and also a study of the turbulence kinetic energy and mean axial velocity is presented so as to assess the influence of proximity of river surface from rotor in the wake geometry. Hence, even for a single turbine facility it is still necessary to consider the propagation of the wake over the spatial domain.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Publicador: dc.publisherAcademia Brasileira de Ciências-
Direitos: dc.rightsAcesso Aberto-
Direitos: dc.rightsAnais da Academia Brasileira de Ciências - This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000602441&lng=en&nrm=iso. Acesso em: 16 mar. 2018.-
Palavras-chave: dc.subjectTurbinas hidrocinéticas-
Palavras-chave: dc.subjectDinâmica dos fluidos - programas de computador-
Palavras-chave: dc.subjectTurbulência-
Título: dc.titleNumerical study of wake characteristics in a horizontal-axis hydrokinetic turbine-
Tipo de arquivo: dc.typelivro digital-
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