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dc.contributor.authorValentín Ruiz, David
dc.contributor.authorPresas Batlló, Alexandre
dc.contributor.authorEgusquiza Estévez, Eduard
dc.contributor.authorValero Ferrando, Ma. del Carmen
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.date.accessioned2016-04-28T07:58:42Z
dc.date.available2016-04-28T07:58:42Z
dc.date.issued2015
dc.identifier.citationValentin, D., Presas, A., Egusquiza, E., Valero, M. Influence of non-rigid surfaces on the dynamic response of a submerged and confined disk. A: IAHR International Workshop on Cavitation and Dynamic Problems in Hydraulic Machinery. "Cavitation and dynamic problems : 6 th IAHR meeting of the Working Group, IAHRWG 2015 : Ljubljana, Slovenia, September 9-11, 2015 : Proceedings". Ljubljana: 2015, p. 251-258.
dc.identifier.isbn978-961-6770-31-6
dc.identifier.urihttp://hdl.handle.net/2117/86310
dc.description.abstractDetermining the dynamic response of submerged and confined disk-like structures is of interest in the hydraulic turbines field. Disks present similar dynamic characteristics than hydraulic turbine runners, especially in the mode-shapes associated with each natural frequency. The dynamic response of submerged structures is heavily affected by the added mass and damping as well as the proximity of solid boundaries. In all studies the solid boundaries are commonly considered completely rigid, however in real cases this is not always true. This fact occurs in some hydraulic turbines where the casing is not completely stiff and it may have some dynamic response in the frequency range of the runner, which may affect its dynamic behavior. To determine the influence of the casing stiffness on a vibrating disk submerged in water an experimental investigation has been carried out. A test rig consisting of a disk attached to a shaft inside a cylindrical tank closed with two different covers with different stiffness has been built up. The disk was impacted using a hammer and both disk and covers responses were measured with different accelerometers. Pressure sensors mounted on the covers have also been used. Natural frequencies of the disk have been obtained, compared and discussed for different disk to cover distances.
dc.format.extent8 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subject.lcshFluid mechanics
dc.subject.lcshHydraulic turbines -- Dynamics
dc.subject.otherAdded mass
dc.subject.otherNatural frequency
dc.subject.otherNon-rigid surface
dc.subject.otherDynamic response
dc.titleInfluence of non-rigid surfaces on the dynamic response of a submerged and confined disk
dc.typeConference report
dc.subject.lemacMecànica de fluids
dc.subject.lemacTurbines hidràuliques
dc.contributor.groupUniversitat Politècnica de Catalunya. FLUIDS - Enginyeria de Fluids
dc.identifier.dlFaculty of Technologies and Systems
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://iahrwg2015.si/files/papers/3_Hydraulic_oscillation_flow_induces_vibration_and_FSI/IAHR_WG_15_3_11_VALENTIN.pdf
dc.rights.accessOpen Access
local.identifier.drac17706600
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO/6PN/DPI2012-36264
local.citation.authorValentin, D.; Presas, A.; Egusquiza, E.; Valero, M.
local.citation.contributorIAHR International Workshop on Cavitation and Dynamic Problems in Hydraulic Machinery
local.citation.pubplaceLjubljana
local.citation.publicationNameCavitation and dynamic problems : 6 th IAHR meeting of the Working Group, IAHRWG 2015 : Ljubljana, Slovenia, September 9-11, 2015 : Proceedings
local.citation.startingPage251
local.citation.endingPage258


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