Exploració per autor "Escaler Puigoriol, Francesc Xavier"
Ara es mostren els items 30-49 de 142
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Evolución Vibraciones Alta Frecuencia Rasquetas Crepado y Limpieza PM21 hasta Agosto 2010
Escaler Puigoriol, Francesc Xavier (2010-09-10)
Report de recerca
Accés restringit per acord de confidencialitat -
Evolución Vibraciones Rasquetas Crepado y Limpieza PM21 en Septiembre 2010
Escaler Puigoriol, Francesc Xavier (2010-10-25)
Report de recerca
Accés restringit per acord de confidencialitat -
Experimental and numerical analysis of directional added mass effects in partially liquid-filled horizontal pipes
Escaler Puigoriol, Francesc Xavier; Torre Rodríguez, Oscar de la; Goggins, Jamie (2017-02)
Article
Accés obertThe change of pipe natural frequencies due to added mass effects has been investigated in two cylindrical horizontal pipes from empty to completely water filled cases with various intermediate partially-filled conditions. ... -
Experimental and numerical modal analysis of a reduced scale Kaplan turbine model
Roig Bauzà, Rafel; Torre Rodríguez, Óscar de la; Jou Santacreu, Esteban; Mulu, Berhanu; Escaler Puigoriol, Francesc Xavier (2021)
Text en actes de congrés
Accés obertThis paper presents an experimental modal test of a Kaplan turbine model and provides the corresponding analysis of the results. The modal test, which included both the runner and the shaft line, was performed using an ... -
Experimental and numerical study on the detection of fatigue failure in hydraulic turbines
Sánchez Botello, Xavier; de la Torre, Adolfo; Roig Bauzà, Rafel; Jou Santacreu, Esteban; Torre Rodríguez, Óscar de la; Ayneto Gubert, Javier; Escaler Puigoriol, Francesc Xavier (Springer, 2023-10-06)
Article
Accés obertDetecting fatigue cracks in hydraulic turbine runners is costly, as it requires to stop the unit, empty it of water and access the runner for inspection. Thus, an alternative way based on monitoring the changes of the ... -
Experimental investigation of a cavitating Venturi and its application to flow metering
Bermejo Plana, David; Escaler Puigoriol, Francesc Xavier; Ruiz Mansilla, Rafael (2021-04)
Article
Accés obertAn 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 added mass effects on a hydrofoil under cavitation conditions
Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier; Egusquiza Estévez, Eduard; Farhat, Mohamed (2013-03-13)
Article
Accés restringit per política de l'editorialThe influence of leading edge sheet cavitation and supercavitation on the added mass effects experienced by a 2-D NACA0009 truncated hydrofoil has been experimentally investigated in a hydrodynamic tunnel. A non-intrusive ... -
Experimental Investigation of the Cavitation Effects on the Heat Generation in a Closed Loop Pumping System
Bermejo Plana, David; Escaler Puigoriol, Francesc Xavier; Dular, Matevz; Ruiz Mansilla, Rafael (2018)
Text en actes de congrés
Accés obertA 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
De la Torre Rodriguez, Oscar; Escaler Puigoriol, Francesc Xavier; Egusquiza Estévez, Eduard; Farhat, Mohamed (2016-12-01)
Article
Accés obertThe 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 ... -
Experimental study of the dynamic response of partially filled pipes focused on natural frequencies and mode shapes
De la Torre Rodriguez, Oscar; Escaler Puigoriol, Francesc Xavier; Goggins, Jamie (American Society of Mechanical Engineers (ASME), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe presence of air in piping systems is a major concern in the industry. Problems like flow disruption, reduction of hydraulic machinery efficiencies or a significant drop in pipe capacity are many times related to this ... -
Failure investigation of a Francis turbine under the cavitation conditions
Liu, Xin; Wang, Zhengwei; Zhou, Lingjiu; Escaler Puigoriol, Francesc Xavier (2016)
Text en actes de congrés
Accés obertAcoustic-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 ... -
Fatigue damage analysis of a Kaplan turbine model operating at off-design and transient conditions
Roig Bauzà, Rafel; Sánchez Botello, Xavier; Torre Rodríguez, Óscar de la; Ayneto Gubert, Javier; Högström, Carl-Maikel; Mulu, Berhanu; Escaler Puigoriol, Francesc Xavier (2023-09-07)
Article
Accés obertThe current renewable energy market forces hydraulic turbines to operate for longer periods of time at off-design and transient conditions. Their life expectancy is then decreased due to the wear provoked by flow instabilities ... -
Fiber bragg grating sensors for underwater vibration measurement: potential hydropower applications
Torre Rodríguez, Óscar de la; Floris, Ingazio; Sales, Salvador; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2021-06-22)
Article
Accés obertThe present paper assesses the performance and characteristics of fiber Bragg grating sensors, with a special interest in their applications in hydraulic machinery and systems. The hydropower industry is turning to this ... -
Full-scale wind turbine vibration signature analysis
Escaler Puigoriol, Francesc Xavier; Mebarki, Toufik (2018-12-07)
Article
Accés obertA sample of healthy wind turbines from the same wind farm with identical sizes and designs was investigated to determine the average vibrational signatures of the drive train components during normal operation. The units ... -
Implicit large eddy simulation of unsteady cloud cavitation around a plane-convex hydrofoil
Hidalgo, Victor; Luo, Xian-wu; Escaler Puigoriol, Francesc Xavier; Ji, Bin; Aguinaga, Alvaro (2015-12-01)
Article
Accés obertThe 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 ... -
Improvement of cavitation mass transfer modeling by including Rayleigh–Plesset equation second order term
Geng, Linlin; Chen, Jian; Escaler Puigoriol, Francesc Xavier (2020-06-03)
Article
Accés restringit per política de l'editorialThe current study evaluates the effect of taking into account the second order term of the Rayleigh– Plesset equation for the numerical simulation of cavitation with homogeneous mixture models. For that, the corrected ... -
Influence of draft tube water injection system on cavitation behaviour in a full-scale Francis turbine with visual access
Vilberg, Ingrid; Kjeldsen, Morten; Escaler Puigoriol, Francesc Xavier; Ekanger, Jarle; Nielsen, TK (2018)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper describes the results of a comprehe nsive and ongoing project to control unsteady fluid - dynamic behaviour and associated effects at Svorka hydro power plant (25 MW, 260 m, 600 rpm), operated by Statkraft in ... -
Influence of outlet flow temperature at EX07 heat exchangers of ALBA synchrotron cooling system
Escaler Puigoriol, Francesc Xavier (2014-06-12)
Report de recerca
Accés restringit per acord de confidencialitatThe ALBA synchrotron cooling system relies in two heat exchangers (EX07 A and B) that transfer heat from the system hot water to cold water coming from a cogeneration plant. As a result, the water temperature can be ... -
Informe 1 de la ampliación del modelo del sistema de refrigeración de ALBA
Escaler Puigoriol, Francesc Xavier; Prieto Moliné, Montserrat (2014-07-30)
Report de recerca
Accés restringit per acord de confidencialitat -
Informe 2 de la ampliación del modelo del sistema de refrigeración de ALBA
Escaler Puigoriol, Francesc Xavier; Prieto Moliné, Montserrat (2014-09-18)
Report de recerca
Accés restringit per acord de confidencialitat