Enviaments recents

  • Influence of the boundary conditions on the natural frequencies of a Francis turbine 

    Valentín Ruiz, David; Ramos Martín, David; Bossio, Matias; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (Institute of Physics (IOP), 2016)
    Text en actes de congrés
    Accés obert
    Natural frequencies estimation of Francis turbines is of paramount importance in the stage of design in order to avoid vibration and resonance problems especially during transient events. Francis turbine runners are submerged ...
  • Influence of non-rigid surfaces on the dynamic response of a submerged and confined disk 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (2015)
    Text en actes de congrés
    Accés obert
    Determining the dynamic response of submerged and confined disk-like structures is of interest in the hydraulic turbines field. Disks present similar dynamic characteristics than hydraulic turbine runners, especially in ...
  • Preliminary results on the assessment of using Venetian blinds as a solar thermal collector in double skin facades in Mediterranean climates 

    Guardo Zabaleta, Alfredo de Jesús; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Alavedra Ribot, Pere (2015)
    Text en actes de congrés
    Accés obert
    The global trend on energy integration and building efficiency is making both researchers and developers look for technical solutions to use façade surfaces for electricity and/or domestic hot water production. These ...
  • Influence of the added mass effect and boundary conditions on the dynamic response of submerged and confined structures 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (2014)
    Text en actes de congrés
    Accés obert
    The dynamic response of submerged and confined disk-like structures is of interest in the flied of hydraulic machinery, especially in hydraulic turbine runners. This response is difficult to be estimated with accuracy due ...
  • Numerical investigation of unsteady cavitation around a NACA 66 hydrofoil using OpenFOAM 

    Escaler Puigoriol, Francesc Xavier (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • ALBA Cooling System Upgrade: Thermal Hydraulic Numerical Simulations 

    Escaler Puigoriol, Francesc Xavier; Prieto Moliné, Montserrat; Estadella, Albert (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
  • Condition monitoring of pump-turbines 

    Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    At present, new renewables like wind, solar and marine energy are having a strong development. The generation of energy by renewables has the disadvantage that it depends on atmospheric conditions. It means that they ...
  • Experimental analysis of the dynamic behavior of a rotating disk submerged in water 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Seidel, Ulrich (2014)
    Text en actes de congrés
    Accés obert
    To study the dynamic behavior of turbine runners (natural frequencies and mode shapes) not only the added mass effect of still water has to be considered. Also the effect of rotation may not be neglected in the dynamic ...
  • Boundary layer effects on the vortex shedding in a Donaldsontype hydrofoil 

    Fontanals García, Alfred; Guardo Zabaleta, Alfredo de Jesús; Zobeiri, Amirreza; Egusquiza Estévez, Eduard; Farhat, Mohamed; Avellan, François (2014)
    Comunicació de congrés
    Accés obert
    Fluid - Structure Interaction (FSI) phenomena is becoming a relevant study field for the design or revamping of hydropower plants. The generalized trend of increasing flow rates and reducing rotor blades/stay vanes thickness ...
  • Estudio de sensibilidad de parámetros de modelos en flujos cavitantes en régimen no estacionario 

    Franco Cappa, E; Moll, Flavio; Coussirat Núñez, Miguel Gustavo; Gandolfo, Ernesto; Fontanals García, Alfred; Guardo Zabaleta, Alfredo de Jesús (Asociación Argentina de Mecánica Computacional, 2014)
    Comunicació de congrés
    Accés obert
    La cavitación es un complejo fenómeno físico que se presenta generalmente en flujos turbulentos afectado por varios factores, como la presión del sistema y la concentración de gases no condensables disueltos. Para analizar ...
  • Estudio del fenómeno de interacción rotor estator (RSI) en una bomba radial, trabajando fuera de las condiciones de diseño óptimo 

    Coussirat Núñez, Miguel Gustavo; Fontanals García, Alfred; Panella, L; Guardo Zabaleta, Alfredo de Jesús (Asociación Argentina de Mecánica Computacional, 2014)
    Comunicació de congrés
    Accés obert
    El flujo en el interior de bombas radiales de altas prestaciones es difícil de describir, (geometría compleja y variable, flujo turbulento y no estacionario). La geometría compleja implica partes tanto móviles (rotor) como ...
  • Analysis of the dynamic response of pump-turbine runners. Part I: Experiment 

    Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen; Huang, Xingxing; Egusquiza Estévez, Eduard; Farhat, Mohamed; Avellan, François (IOPScience, 2012)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    When in operation, pump-turbine runners have to withstand large pressure pulsations generated by the rotor-stator interaction. The analysis of the dynamic behavior of these structures is necessary to avoid damage. For this ...

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