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dc.contributor.authorEscaler Puigoriol, Francesc Xavier
dc.contributor.authorDe la Torre Rodriguez, Oscar
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.identifier.citationEscaler, X., De La Torre, O. Dynamic response of a NACA0009 hydrofoil under cavitation conditions. A: IAHR Symposium on Hydraulic Machinery and Systems. "Proceedings of the 29th IAHR Symposium on Hydraulic Machinery and Systems". 2018, p. 1-9.
dc.description.abstractThe dynamic response of an hydraulic machine is greatly affected by the water due to the added mass effect . However, the presence of cavitation can change the modal response of the coupled fluid - structure system because it modifies the properties of the surrounding fluid, i.e. the speed of sound and density. In this paper, a FEM - based acoustic - fluid model has be en used to simulate the dynamic response of a NACA0009 hydro foil with attached leading edge cavitation . The n atural frequencies and the corresponding mode shapes have been compared for the hydrofoil in air, in still water and in cavitation conditions. The numerical predictions show a good agreement with the experimental results obtained in a high - speed cavitation tunnel. They confirm that different fluid conditions can modify the mode shapes in comparison with the modes in air. The nodal lines of the torsio n and the second bending modes are slightly shifted with water and cavitation. Furthermore, the third mode of vibration under cavitation conditions appears as a combination of the torsion and the second bending shapes. The results indicate that such altera tions are mainly induced by the value of the speed of sound inside the cavity
dc.format.extent9 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.lcshFluid dynamics
dc.subject.otherHydraulic machine
dc.titleDynamic response of a NACA0009 hydrofoil under cavitation conditions
dc.typeConference report
dc.subject.lemacMàquines hidràuliques
dc.subject.lemacMecànica de fluids
dc.contributor.groupUniversitat Politècnica de Catalunya. CDIF - Centre de Diagnòstic Industrial i Fluidodinàmica
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorEscaler, X.; De La Torre, O.
local.citation.contributorIAHR Symposium on Hydraulic Machinery and Systems
local.citation.publicationNameProceedings of the 29th IAHR Symposium on Hydraulic Machinery and Systems

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