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Efecto de la superficie libre en el desempeño global de una turbina fluvial

dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacional
dc.contributor.advisorBenavides Morán, Aldo Germán
dc.contributor.advisorLaín Beatove, Santiago
dc.contributor.authorRodríguez Jaime, Luis Eduardo
dc.date.accessioned2021-05-27T14:27:15Z
dc.date.available2021-05-27T14:27:15Z
dc.date.issued2021
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/79569
dc.descriptiondiagramas, ilustraciones a color, tablas
dc.description.abstractLas turbinas hidrocinéticas son un importante campo de estudio en energías renovables. Uno de los aspectos menos estudiados computacionalmente hasta la fecha es el efecto de la superficie libre en el desempeño del rotor. En este trabajo se presenta el estudio numérico por medio de CFD de una turbina hidrocinética considerando la superficie libre. Se presentan simulaciones considerando dos profundidades de inmersión, definidas por la inmersión de la punta del aspa denominadas 0.19D y 0.55D (con D=diámetro). Los modelos de turbulencia k −w SST y SST Transition son implementados sin superficie libre, definiendo SST Transition para todas las simulaciones transitorias con superficie libre debido a su mejor predicción del coeficiente de potencia. Las variaciones en el coeficiente de potencia y de empuje son estudiadas en ambas inmersiones, así como la deformación de la superficie libre y el desarrollo de la estela. El comportamiento a distintas velocidades de rotación, bajo las dos condiciones de inmersión, es comparado con datos experimentales describiendo una curva similar a la experimental. Se presentan simulaciones cambiando la longitud del dominio y el coeficiente de bloqueo, evidenciando la validez del dominio computacional empleado. Finalmente, se estudia el comportamiento incluyendo el soporte que sostiene el rotor, lo que incrementa principalmente el coeficiente de empuje reportado. La mayor inmersión reporta coeficientes de potencia superiores, lo cual está de acuerdo con los datos experimentales y con estudios computacionales previos.
dc.description.abstractHydrokinetic turbines are an important field of study in renewable energy. Computationally, one of the least aspects studied is the effect of free surface on rotor performance. In this work, numerical study of a hydrokinetic turbine is presented by means of CFD considering the free surface. Simulations are presented considering two immersion depths, defined by the immersion of the blade tip, called 0.19D and 0.55D (with D = diameter). The k −w SST and SST transition turbulence models are implemented without free surface, defining SST Transition for all free surface transient simulations due to its better prediction of the power coefficient. The variations in the power and thrust coefficients are evaluated in both dives, as well as the deformation of the free surface and the development of the wake. The behavior at different rotation speeds, under both immersion conditions, is compared with experimental data describing a similar curve related to the experimental data. Simulations are presented by changing the length of the domain and the blocking coefficient, evidencing the validity of the computational domain used. Finally, the behavior is studied including the structure that supports the rotor, which mainly increases the reported thrust coefficient. The greater immersion reports higher power coefficients, which is in agreement with the experimental data and with previous computational studies.
dc.format.extent1 recurso en línea (93 páginas)
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc620 - Ingeniería y operaciones afines
dc.titleEfecto de la superficie libre en el desempeño global de una turbina fluvial
dc.typeTrabajo de grado - Maestría
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.publisher.programBogotá - Ingeniería - Maestría en Ingeniería - Ingeniería Mecánica
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Ingeniería- Ingeniería Mecánica
dc.identifier.instnameUniversidad Nacional de Colombia
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourlhttps://repositorio.unal.edu.co/
dc.publisher.facultyFacultad de Ingeniería
dc.publisher.placeBogotá
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotá
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.subject.proposalTurbina hidrocinética
dc.subject.proposalDinámica de Fluidos Computacional (CFD)
dc.subject.proposalCoeficiente de potencia
dc.subject.proposalSuperficie libre
dc.subject.proposalHydrokinetic turbine
dc.subject.proposalComputational Fluid Dynamics (CFD)
dc.subject.proposalPower coefficient
dc.subject.proposalFree surface
dc.subject.unescoTurbina hidráulica
dc.subject.unescoDinámica de fluidos
dc.subject.unescoFluid dynamics
dc.subject.unescoWater turbines
dc.title.translatedFree surface effect on the overall performance of a river turbine
dc.type.coarhttp://purl.org/coar/resource_type/c_bdcc
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.contentText
dc.type.redcolhttp://purl.org/redcol/resource_type/TM
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2


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