A novel mechanism of turbulent kinetic energy harvesting by horizontal-axis wind and hydrokinetic turbines

Silva, Reginaldo Nunes da; Nunes, Matheus Montenegro; Mendes, Rafael Castilho Faria; Brasil Junior, Antonio Cesar Pinho; Oliveira, Taygoara Felamingo de

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Campo DC	Valor	Idioma
dc.contributor.author	Silva, Reginaldo Nunes da	-
dc.contributor.author	Nunes, Matheus Montenegro	-
dc.contributor.author	Mendes, Rafael Castilho Faria	-
dc.contributor.author	Brasil Junior, Antonio Cesar Pinho	-
dc.contributor.author	Oliveira, Taygoara Felamingo de	-
dc.date.accessioned	2024-04-12T15:14:32Z	-
dc.date.available	2024-04-12T15:14:32Z	-
dc.date.issued	2023-09-06	-
dc.identifier.citation	SILVA, Reginaldo Nunes da et al. A novel mechanism of turbulent kinetic energy harvesting by horizontal-axis wind and hydrokinetic turbines. Energy, [S. l.], v. 283, 128985, 15 November 2023. DOI: https://doi.org/10.1016/j.energy.2023.128985.	pt_BR
dc.identifier.uri	http://repositorio2.unb.br/jspui/handle/10482/48076	-
dc.language.iso	eng	pt_BR
dc.publisher	Elsevier Ltd.	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	A novel mechanism of turbulent kinetic energy harvesting by horizontal-axis wind and hydrokinetic turbines	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Túnel de vento	pt_BR
dc.subject.keyword	Energia renovável	pt_BR
dc.subject.keyword	Turbulência	pt_BR
dc.subject.keyword	Turbina de eixo horizontal	pt_BR
dc.identifier.doi	https://doi.org/10.1016/j.energy.2023.128985	pt_BR
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S0360544223023794?via%3Dihub	pt_BR
dc.description.abstract1	We present a study on the influence of the turbulence generated by a cylinder on the performance of a free horizontal-axis turbine. The analysis focuses on the power coefficient, flow characteristics, and Turbulence Kinetic Energy (TKE) spectral density distribution. The mean velocity, turbulence intensity, and TKE are evaluated in the upstream and downstream planes of the turbine for configurations with and without the upstream cylinder. The results show that the power coefficient exhibits a peak when the rotor rotation frequency coincides with the frequency of vortex shedding from the cylinder, indicating a mechanism of conversion of TKE carried by large-scale structures into mechanical power. It was also observed that the turbine generates downstream turbulence in the absence of the cylinder but reduces the downstream turbulence when the cylinder is present. Spectral analysis of TKE confirms the influence of the frequency of vortex shedding on the velocity recovery of the turbine wake. The main contribution of this paper is the identification of a new mechanism of conversion of the TKE contained in large coherent turbulent structures into mechanical power. This study provides a further understanding of the complex phenomena involved in the interaction between the turbine and the upstream turbulent flow.	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-0680-4945	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0003-1497-8862	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0002-0438-9506	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0001-9528-9449	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0003-2957-537X	pt_BR
dc.description.unidade	Faculdade UnB Gama (FGA)	pt_BR
dc.description.unidade	Curso de Engenharia de Energia (FGA-Engenharia de Energia)	-
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