Exploració per autor "Sánchez Botello, Xavier"Més informació

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    • 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
      Accés obert
      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 novel modal testing methods for structures rotating in water 

      Roig Bauzà, Rafel; Sánchez Botello, Xavier; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute, 2023-02-23)
      Article
      Accés obert
      The current paper presents an investigation into novel modal testing methods applied to a disk–shaft structure at different rotating speeds in air and water. The structure was excited using three different methods: an ...

    • 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 obert
      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. ...

    • 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 obert
      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 ...

    • 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 obert
      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 ...

    • Modelling and control of the vibration of a rotatory disk 

      Sánchez Botello, Xavier (Universitat Politècnica de Catalunya, 2021-10-12)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   AFC4Hydro

    • Modelling and control of the vibration of a rotatory disk 

      Sánchez Botello, Xavier (Universitat Politècnica de Catalunya, 2021-10-13)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   AFC4Hydro

    • On the added modal coefficients of a rotating submerged cylinder induced by a whirling motion. Part 1: Experimental investigation 

      Roig Bauzà, Rafel; Sánchez Botello, Xavier; Jou Santacreu, Esteban; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-08)
      Article
      Accés obert
      The operation of submerged rotating machines, such as marine current or tidal turbines, can present deleterious fluid phenomena that may provoke extreme structural vibrations. To predict their dynamic responses, it is ...

    • On the added modal coefficients of a rotating submerged cylinder induced by a whirling motion. Part 2: Numerical investigation 

      Roig Bauzà, Rafel; Sánchez Botello, Xavier; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-19)
      Article
      Accés obert
      Part 2 of this work presents a numerical methodology, validated using the experimental results presented in Part 1, to calculate the added modal coefficients of a submerged cylinder in water both when it oscillates and ...

    • On the rotating vortex rope and its induced structural response in a Kaplan turbine model 

      Roig Bauzà, Rafel; Sánchez Botello, Xavier; Escaler Puigoriol, Francesc Xavier; Mulu, Berhanu; Högström, Carl-Maikel (2022-08-29)
      Article
      Accés obert
      The rotating vortex rope, which can be decomposed in the rotating and the plunging modes, is the origin of pressure fluctuations in the draft tube cone when hydraulic turbines operate at part load, compromising the structural ...

    • On the vaneless space vortex structures in a Kaplan turbine model operating at speed no load 

      Roig Bauzà, Rafel; Sánchez Botello, Xavier; Mulu, Berhanu; Högström, Carl-Maikel; Escaler Puigoriol, Francesc Xavier (Multidisciplinary Digital Publishing Institute, 2023-12-15)
      Article
      Accés obert
      The growing installation of intermittent renewable energy sources is forcing hydraulic turbines to work more frequently at speed no load when dangerous vaneless space vortex structures and stochastic flow phenomena can ...

    • Posada en marxa d’un sistema de mesures en un túnel de cavitació 

      Sánchez Botello, Xavier (Universitat Politècnica de Catalunya, 2018-06-21)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Condorchem Envitech
      Actualment l’enginyeria mediambiental de tractament d’efluents industrials Condorchem Envitech, S.L. està realitzant un estudi científic per a cercar una font de calor alternativa per millorar la generació de calor en els ...

    • 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 obert
      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 ...