Exploració per autor "Torre Rodríguez, Óscar de la"
Ara es mostren els items 6-23 de 23
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Dynamic response analysis of a reduced scale Kaplan turbine model operating in propeller mode
Escaler Puigoriol, Francesc Xavier; Sánchez Botello, Xavier; Roig Bauzà, Rafel; Torre Rodríguez, Óscar de la; Mulu, Berhanu; Högström, Carl-Maikel (IOP Publishing, 2022)
Text en actes de congrés
Accés obertIn the frame of the AFC4Hydro H2020 research project, an extensive measurement campaign has been carried out on a reduced scale Kaplan turbine model at the Vattenfall Research and Development facility in Älvkarleby, Sweden. ... -
Effect of the current-wave angle on the local scour around circular piles
Torre Rodríguez, Óscar de la; Hann, Martyn; Miles, Jon; Stripling, Stuart; Greaves, Deborah (2022-01)
Article
Accés obertThis paper studies the effect of the wave front-current angle on the scour around a circular pile. An experimental study was carried out in the Coastal, Ocean and Sediment Transport (COAST) laboratory at the University of ... -
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 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 ... -
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 ... -
Modelling and adaptive parameter estimation for a piezoelectric cantilever beam
Wang, Bin; Costa Castelló, Ramon; Na, Jing; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (2022)
Article
Accés obertThis paper proposes a new adaptive estimation approach to online estimate the model parameters of a piezoelectric cantilever beam. The beam behavior is firstly modeled using partial differential equations (PDE) considering ... -
Numerical assessment of parameters influencing the modal response of a Kaplan turbine model
Roig Bauzà, Rafel; Torre Rodríguez, Óscar de la; Jou Santacreu, Esteban; Escaler Puigoriol, Francesc Xavier (Institute of Physics (IOP), 2021)
Text en actes de congrés
Accés obertThe present study intends to investigate numerically the impact of: i) the fluid added mass, ii) the turbine rotational speed and iii) the variation of the runner blade bearing stiffness due to the turbine water head on ... -
Numerical investigation of the effects of hydrofoil vibrations on the unsteady behavior of cavitation
Geng, Linlin; Chen, Jian; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (Institute of Physics (IOP), 2021)
Text en actes de congrés
Accés obertIn order to better understand the fluid-structure interaction (FSI) in hydraulic machines, this study aims to numerically investigate the flow around an oscillating hydrofoil with special attention on the effect of ... -
Numerical modal analysis of a Kaplan turbine runner
Roig Bauzà, Rafel; Torre Rodríguez, Óscar de la; Jou Santacreu, Esteban; Escaler Puigoriol, Francesc Xavier (2020)
Comunicació de congrés
Accés obertThe aim of the research has been to investigate the change of dynamic behavior of a Kaplan turbine runner when submerged in still water. More specifically, the effects of the added mass on the modes of vibration have been ... -
Numerical simulation of cavitation erosion aggressiveness induced by unsteady cloud cavitation
Geng, Linlin; Chen, Jian; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute, 2020-08-01)
Article
Accés obertA numerical investigation of the erosion aggressiveness of leading edge unsteady cloud cavitation based on the energy balance approach has been carried out to ascertain the main damaging mechanisms and the influence of the ... -
Prediction of cavitation erosion with different erosion risk indicators
Geng, Linlin; Zhang, Dingli; Chen, Jian; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (2022-02)
Article
Accés obertThis present work devoted to simulate the unsteady cavitating flow around a hydrofoil and assess its erosion power predicted by different erosion risk indicators. For that, the behavior of unsteady cloud cavity is numerically ... -
PZT actuators as on-board instruments to reduce vibrations and strains in submerged structures
Sánchez Botello, Xavier; Torre Rodríguez, Óscar de la; Roig Bauzà, Rafel; Costa Castelló, Ramon; Escaler Puigoriol, Francesc Xavier (IOP Publishing, 2022)
Text en actes de congrés
Accés obertThis paper presents the design and evaluation of an active control system to reduce vibrations and strains of submerged structures. For that, a metallic disk mounted in a test rig has been equipped with on-board waterproof ... -
The effect of cavitation on the natural frequencies of a hydrofoil
Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier; Egusquiza Estévez, Eduard; Dreyer, Matthieu; Farhat, Mohamed (2012)
Comunicació de congrés
Accés obert -
Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
Roig Bauzà, Rafel; Chen, Jian; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (2021-09-22)
Article
Accés obertTo accelerate the integration of fluctuating renewable energy technologies in the power systems, it is necessary to increase the flexibility of hydropower by operating turbines at off-design conditions. Unfortunately, this ... -
Validation of the multi-objective structural optimisation of a composite turbine blade
Fagan, Edward M.; Torre Rodríguez, Óscar de la; Leen, Sean B.; Goggins, Jamie (2018-11-15)
Article
Accés obertStructural optimisation of a wind turbine blade is presented in this work. The optimisation was performed using a multi-objective genetic algorithm and finite element modelling to determine the optimal structural design ... -
Wind tunnel testing of a high aspect ratio wing model
Cooper, Jonathan E.; Cook, Robbie G; Francois, G.; Torre Rodríguez, Óscar de la; Neild, Simon A.; Lowenberg, Mark H.; Alexander, S. S.; Coetzee, E. B.; Evans, M. (Curran, 2019)
Text en actes de congrés
Accés obertThere is much current interest in the development of High Aspect Ratio Wing (HARW) designs for improved aircraft performance. However, there are a lack of relevant data sets available to validate aeroelastic modelling ...