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dc.contributor.authorZhang, Ming
dc.contributor.authorValentín Ruiz, David
dc.contributor.authorValero Ferrando, Ma. del Carmen
dc.contributor.authorEgusquiza Montagut, Mònica
dc.contributor.authorEgusquiza Estévez, Eduard
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.identifier.citationZhang, M. [et al.]. Failure investigation of a Kaplan turbine blade. "Engineering failure analysis", 1 Març 2019, vol. 97, p. 690-700.
dc.description.abstractIn this paper, an uncommon failure of a Kaplan turbine blade has been analyzed. After the monitoring system detected a sudden increase in vibration levels, the turbine was inspected. The inspection showed that a large crack occurred on one blade starting from the leading-edge side root hole. Moreover, the tip of the blade was also found broken. A comprehensive analysis of the crack surfaces, broken parts and the vibration data revealed a fatigue problem probably caused by rubbing between the blade and the nearby wall. The effect of contacts on the stress distribution of the blade was investigated through a numerical model of the turbine blade. To validate this numerical model an experimental modal analysis was done on a nondamaged blade and the results showed a good agreement with the numerical results. Stress distribution analysis showed that when applying a contact force, the stress at the leading-edge root hole increases drastically. Therefore, experimental evidences as well as numerical simulations confirm that the crack occurred due to rubbing between the blade tip and the nearby wall.
dc.format.extent11 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluids
dc.subject.otherFailure of a Kaplan turbine blade
dc.subject.otherTurbine Kaplan
dc.titleFailure investigation of a Kaplan turbine blade
dc.subject.lemacTurbines hidràuliques
dc.contributor.groupUniversitat Politècnica de Catalunya. FLUIDS - Enginyeria de Fluids
dc.contributor.groupUniversitat Politècnica de Catalunya. CDIF - Centre de Diagnòstic Industrial i Fluidodinàmica
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorZhang, M.; Valentin, D.; Valero, M.; Egusquiza, M.; Egusquiza, E.
local.citation.publicationNameEngineering failure analysis

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