Browsing by Subject "Cavitation"
Now showing items 1-20 of 57
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Added mass effects of attached cavitation on the blades of a Francis runner
(2016)
Conference report
Open Access -
Anàlisi, calibratge i posta en marxa d’un banc d’assaig de cavitació amb finalitats docents
(Universitat Politècnica de Catalunya, 2019-07-10)
Bachelor thesis
Open AccessEl departament de Mecànica de Fluids disposa d’un banc d’assaig amb un venturi que es vol aprofitar per a l’estudi de pèrdues de càrrega i cavitació. En el treball, s’avaluen les condicions de funcionament del banc d’assaig ... -
Assessment of RANS turbulence models and Zwart cavitation model empirical coefficients for the simulation of unsteady cloud cavitation
(Engineering Applications of Computational Fluid Mechanics, 2019-11-26)
Article
Open AccessThe numerical simulation of unsteady cavitation flows is sensitive to the selected models and associated parameters. Consequently, three Reynolds Average Navier-Stokes (RANS) turbulence models and the Zwart cavitation model ... -
Assessment of remote cavitation detection methods with flow visualization in a full scale francis turbine
(2018)
Conference report
Open AccessThis paper describes the experimental investigations carried out in the Francis turbine at Svorka power plant operated by Statkraft in Norway. The unit, with a head of 260 m, can deliver a maximum output load of 25 MW. The ... -
Assessment of turbulence models for the prediction of Bénard- Von Kármán vortex shedding behind a truncated hydrofoil in cavitation conditions
(Institute of Physics (IOP), 2021)
Conference report
Open AccessThe transient cavitating flow in the wake of a hydrofoil at zero incidence angle has been simulated using a homogeneous mixture cavitation mass transfer model combined with both Reynolds Average Navier-Stokes (RANS) and ... -
Cavitation effects on the structural resonance of hydraulic turbines: Failure analysis in a real francis turbine runner
(2018-09-03)
Article
Open AccessWhen discussing potential resonances in hydraulic turbine runners, cavitation effects are usually neglected. Nevertheless, recent studies have experimentally proved, that large cavitation volumes in the proximity of flexible ... -
Cavitation intensity measured on a Naca 0015 hydrofoil with various gas contents
(2012)
Conference lecture
Restricted access - publisher's policy -
Detection of erosive cavitation on hydraulic turbines through demodulation analysis
(Institute of Physics (IOP), 2018)
Conference report
Open AccessErosive cavitation in hydraulic turbines affects severely the runner structure, increasing maintenance costs and reducing the remaining useful life of the component. Actual vibro-acoustic techniques used to detect this ... -
Dynamic response of a NACA0009 hydrofoil under cavitation conditions
(2018)
Conference report
Restricted access - publisher's policyThe 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 ... -
Effect of cavitation in a Venturi closed-loop system
(Universitat Politècnica de Catalunya, 2020-02-14)
Tutored research work
Restricted access - author's decisionThe cavitation of liquid water in a Venturi throat section is an interesting and complex phenomenon to study. This paper focuses on the analysis of a set of experiments highlighting this effect, and the main purpose is to ... -
Estudi d'un model de cavitació en OpenFOAM i validació amb dades experimentals i simulacions en Fluent
(Universitat Politècnica de Catalunya, 2010-09)
Master thesis (pre-Bologna period)
Open Access -
Estudio de la cavitación en una turbina en modo bomba
(Universitat Politècnica de Catalunya, 2021-01-26)
Bachelor thesis
Open AccessL'objectiu d'aquest treball és l'estudi de la cavitació en una turbina en mode bomba mitjançant mètodes numèrics. En els primers apartats es fa un resum de les equacions bàsiques de la dinàmica de fluids i una introducció ... -
Estudio teórico del Tunel de Cavitación y análisis del sistema de medición
(Universitat Politècnica de Catalunya / Universidad de Buenos Aires, 2014)
Bachelor thesis
Open AccessEl fenómeno de la cavitación es uno de los principales motivos del deterioro de las hélices o turbomáquinas (bomba axial en fluido incompresible) y, por ello, resulta un factor fundamental a tener en cuenta en el diseño ... -
Estudio teórico del túnel de cavitación y análisis del sistema de medición
(Universitat Politècnica de Catalunya / Universidad de Buenos Aires, 2014)
Bachelor thesis
Open AccessEl fenómeno de la cavitación es uno de los principales motivos del deterioro de las hélices o turbomáquinas (bomba axial en fluido incompresible) y, por ello, resulta un factor fundamental a tener en cuenta en el diseño ... -
Estudio y validación de modelos de cavitación en un código de mecánica de fluidos computacional
(Universitat Politècnica de Catalunya, 2012-06)
Master thesis (pre-Bologna period)
Open AccessThis Project deals with the study and validation of an implemented model of cavitation developed by Philip J.Zwart, Andrew G.Gerber and T.Belamri in CFD using ANSYS Fluent software. Several numerical simulations have ... -
Experimental investigation of a cavitating Venturi and its application to flow metering
(2021-04)
Article
Restricted access - publisher's policyAn experimental investigation has been carried out to evaluate the performance of a cavitating Venturi flow. For that purpose, a closed loop circuit with a centrifugal pump and a transparent asymmetric converging-diverging ... -
Experimental Investigation of the Cavitation Effects on the Heat Generation in a Closed Loop Pumping System
(2018)
Conference report
Open AccessA series of tests were carried out in the cavitation tunnel of the Laboratory for Water and Turbine Machines of the University of Ljubljana in order to investigate the effects of cavitation in the water heating process of ... -
Experimental mode shape determination of a cantilevered hydrofoil under different flow conditions
(2016-12-01)
Article
Open AccessThe first three mode shapes of a cantilevered NACA0009 hydrofoil were experimentally investigated in air and under different flow conditions in a cavitation tunnel. First and second bending modes and first torsion mode ... -
Failure investigation of a Francis turbine under the cavitation conditions
(2016)
Conference report
Open AccessAcoustic-Structural coupling methodology has been used to numerically investigate the failure of a Francis turbine runner that broke down within one day of operation. The goal of the work has been to determine the feasibility ... -
Implicit large eddy simulation of unsteady cloud cavitation around a plane-convex hydrofoil
(2015-12-01)
Article
Open AccessThe present paper focuses on the erosive cavitation behavior around a plane convex hydrofoil. The Zwart-Gerber-Belamri cavitation model is implemented in a library form to be used with the OpenFOAM. The implicit large eddy ...
