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dc.contributor.authorPresas Batlló, Alexandre
dc.contributor.authorValentín Ruiz, David
dc.contributor.authorEgusquiza Estévez, Eduard
dc.contributor.authorValero Ferrando, Ma. del Carmen
dc.contributor.authorSeidel, Ulrich
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.date.accessioned2016-05-19T10:37:15Z
dc.date.available2020-04-01T00:26:32Z
dc.date.issued2016-04-01
dc.identifier.citationPresas, A., Valentin, D., Egusquiza, E., Valero, M., Seidel, U. Dynamic response of a rotating disk submerged and confined. Influence of the axial gap. "Journal of fluids and structures", 01 Abril 2016, vol. 62, p. 332-349.
dc.identifier.issn0889-9746
dc.identifier.urihttp://hdl.handle.net/2117/87181
dc.description.abstractIn this paper, the natural frequencies and mode shapes of a rotating disk submerged and totally confined inside a rigid casing, have been obtained. These have been calculated analytically, numerically and experimentally for different axial gaps disk-casing. A simplified analytical model to analyse the dynamic response of a rotating disk submerged and confined, that has been used and validated in previous researches, is used in this case, generalised for arbitrary axial gaps disk-casing. To use this model, it is necessary to know the averaged rotating speed of the flow with respect to the disk. This parameter is obtained after an analytical discussion of the motion of the flow inside the casing where the disk rotates, and by means of CFD simulations for different axial positions of the disk. The natural frequencies of the rotating disk for the different axial confinements can be calculated following this method. A Finite Element Model has been built up to obtain the natural frequencies by means of computational simulation. The relative velocity of the flow with respect to the disk is also introduced in the simulation model in order to estimate the natural frequencies of the rotating disk. Experimental tests have been performed with a rotating disk test rig. A thin stainless steel disk (thickness of 8 mm, (h/r<5%) and mass of 7.6 kg) rotates inside a rigid casing. The position of the disk can be adjusted at several axial gaps disk-casing. A piezoelectric patch (PZT) attached on the rotating disk is used to excite the structure. Several miniature and submergible accelerometers have measured the response from the rotating frame. Excitation and measured signals are transmitted from the rotating to the stationary frame through a slip ring system. Experimental results are contrasted with the results obtained by the analytical and numerical model. Thereby, the influence of the axial gap disk-casing on the natural frequencies of a rotating disk totally confined and surrounded by a heavy fluid is determined.
dc.format.extent18 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluids
dc.subject.lcshHydraulic machinery
dc.subject.otherDynamic response
dc.subject.otherFluid-structure interaction
dc.subject.otherMode shapes
dc.subject.otherNatural frequencies
dc.subject.otherRotating disk
dc.titleDynamic response of a rotating disk submerged and confined. Influence of the axial gap
dc.typeArticle
dc.subject.lemacMàquines hidràuliques
dc.contributor.groupUniversitat Politècnica de Catalunya. FLUIDS - Enginyeria de Fluids
dc.identifier.doi10.1016/j.jfluidstructs.2016.02.003
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0889974616000311
dc.rights.accessOpen Access
local.identifier.drac17943217
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO//DPI2012-36264/ES/ANALISIS DE LA INTERACCION FLUIDO-ESTRUCTURA EN PERFILES HIDRAULICOS DE BAJA VORTICIDAD Y SU EFECTO EN LA RESPUESTA DINAMICA DE TURBINAS-BOMBA/
local.citation.authorPresas, A.; Valentin, D.; Egusquiza, E.; Valero, M.; Seidel, U.
local.citation.publicationNameJournal of fluids and structures
local.citation.volume62
local.citation.startingPage332
local.citation.endingPage349


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