Now showing items 1-20 of 23

    • Accelerated life testing study of a novel tidal turbine blade attachment 

      Torre Rodríguez, Óscar de la; Moore, Daithi; Gavigan, Declan; Goggins, Jamie (2018-09)
      Article
      Open Access
      This paper describes the setup and some results of an accelerated life testing study of a tidal turbine blade attachment, which involved high-cycle fatigue testing of a tidal turbine subsystem at the Large Structure ...
    • An automated standard-based life cycle quality inspection methodology for smart precast concrete solutions in buildings 

      Hajdukiewicz, Magdalena; Goggins, Jamie; Torre Rodríguez, Óscar de la; Holleran, Dave; Keane, Marcus M. (2019-07-29)
      Article
      Open Access
      Built2Spec research project brought together a new and breakthrough set of tools in order to improve construction quality inspection processes. These can be put into the hands of construction stakeholders to help meet ...
    • Analysis of chatter marks damage on the Yankee dryer surface of a tissue machine 

      Escaler Puigoriol, Francesc Xavier; Torre Rodríguez, Óscar de la; Egusquiza Estévez, Eduard (Elsevier, 2012-03-08)
      Article
      Restricted access - publisher's policy
      A tissue machine suffering from Yankee chatter marks has been experimentally investigated. A series of vibration measurements during normal operation at various Yankee speeds on both the creping and the cleaning blade ...
    • Assessment of fiber Bragg grating sensors for monitoring shaft vibrations of hydraulic turbines 

      Sánchez Botello, Xavier; Roig Bauzà, Rafel; Torre Rodríguez, Óscar de la; Madrigal, Javier; Sales, Salvador; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2023-07-26)
      Article
      Open Access
      The structural dynamic response of hydraulic turbines needs to be continuously monitored to predict incipient failures and avoid catastrophic breakdowns. Current methods based on traditional off-board vibration sensors ...
    • Assessment of turbulence models for the prediction of Bénard- Von Kármán vortex shedding behind a truncated hydrofoil in cavitation conditions 

      Chen, Jian; Geng, Linlin; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (Institute of Physics (IOP), 2021)
      Conference report
      Open Access
      The 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 ...
    • 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)
      Conference report
      Open Access
      In 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
      Open Access
      This 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)
      Conference report
      Open Access
      This 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
      Open Access
      Detecting 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
      Restricted access - publisher's policy
      The 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
      Open Access
      The 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
      Open Access
      The 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
      Open Access
      This 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)
      Conference report
      Open Access
      The 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)
      Conference report
      Open Access
      In 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)
      Conference lecture
      Open Access
      The 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
      Open Access
      A 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
      Restricted access - publisher's policy
      This 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)
      Conference report
      Open Access
      This 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)
      Conference lecture
      Open Access