Ara es mostren els items 1-20 de 40

  • Accurate determination of the frequency response function of submerged and confined structures by using PZT-patches 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Bossio, Matias (2017-03-22)
    Article
    Accés obert
    To accurately determine the dynamic response of a structure is of relevant interest in many engineering applications. Particularly, it is of paramount importance to determine the Frequency Response Function (FRF) for ...
  • Analysis if the dynamic response of pump-turbine runners- Part I: Experiment 

    Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard; Huang, Xingxing; Farhat, Mohamed; Avellan, François (2012)
    Text en actes 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 ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Analysis of damage caused by siloxanes in stationary reciprocating internal combustion engines operating with landfill gas 

    Álvarez Flórez, Jesús Andrés; Egusquiza Estévez, Eduard (Elsevier, 2015-02-04)
    Article
    Accés obert
    Failures in reciprocating internal combustion engines operating with landfill gas are not uncommon. In general, damage is located in the combustion chamber surfaces and in the ring grooves, where a layer of non-volatile ...
  • Analysis of the dynamic response of pump-turbine impellers. Influence of the rotor 

    Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre; Huang, Xingxing; Guardo Zabaleta, Alfredo de Jesús; Seidel, Ulrich (2016-02-01)
    Article
    Accés restringit per política de l'editorial
    This paper deals with the dynamic response of pump-turbine impellers. A pump-turbine impeller is a complex structure attached to a rotor and rotating inside a casing full of water with very small clearances between the ...
  • 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 ...
  • Assessment of the economic and environmental impact of double glazed façade ventilation systems in Mediterranean climates 

    Valentín Ruiz, David; Guardo Zabaleta, Alfredo de Jesús; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Alavedra, Pere (2013-09-30)
    Article
    Accés obert
    Free convection is the most often used method in order to reduce solar load gains on a building with double glazed façades (DGFs). However, depending on the climate factors, the thermal performance of a DGF may not be ...
  • 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 ...
  • Capability of structural-acoustical FSI numerical model to predict natural frequencies of submerged structures with nearby rigid surfaces 

    Rodríguez, Cristian; Flores, P.; Pierart, F.G.; Contzen, L.R.; Egusquiza Estévez, Eduard (2012-07-01)
    Article
    Accés restringit per política de l'editorial
    Structural–acoustical model is used in industry to determine natural frequencies of runners and impellers in hydraulic turbomachinery in the stage of design. In these calculations the fluid domain is considered with ...
  • Comportament dinàmic de màquines hidràuliques 

    Egusquiza Estévez, Eduard (Edicions UPC, 2003)
    Llibre
    Accés restringit a la comunitat UPC
    Aquest llibre fa una anàlisi completa del comportament dinàmic/vibratori de màquines hidràuliques, des de les forces excitadores que actuen sobre la màquina fins a les vibracions finals generades. Està destinat tant a ...
  • Computational fluid dynamics modeling of impinging gas-jet systems: I. Assessment of eddy viscosity models 

    Coussirat Núñez, Miguel Gustavo; van Beeck, J; Mestres Ridge, Marc; Egusquiza Estévez, Eduard; Buchlin, J-M; Escaler Puigoriol, Francesc Xavier (2005-07-15)
    Article
    Accés restringit per política de l'editorial
    Computational fluid dynamics plays an important role in engineering design. To gain insight into solving problems involving complex industrial flows, such as impinging gas-jet systems (IJS), an evaluation of several eddy ...
  • Computational fluid dynamics modeling of impinging gas-jet systems: II. Application to an industrial cooling system device 

    Coussirat Núñez, Miguel Gustavo; van Beeck, J; Mestres Ridge, Marc; Egusquiza Estévez, Eduard; Buchlin, J-M; Valero Ferrando, Ma. del Carmen (2005-07-15)
    Article
    Accés restringit per política de l'editorial
    A numerical analysis of the flow behavior in industrial cooling systems based on arrays of impinging jets has been performed, using several eddy viscosity models to determine their modeling capabilities. For the cooling ...
  • 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 ...
  • Condition monitoring of pump-turbines. New challenges 

    Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Valentín Ruiz, David; Presas Batlló, Alexandre; Rodriguez Godoy, Cristian (2015-05)
    Article
    Accés obert
    At present, pumped storage is the only system to store huge amounts of energy. The surplus of energy in the electrical grid is used for pumping water from a lower to a higher reservoir (pump operation). At peak hours or ...
  • Detailed study of the rotor-stator interaction phenomenon in a moving cascade of airfoils 

    Fontanals García, Alfred; Coussirat Núñez, Miguel Gustavo; Guardo Zabaleta, Alfredo de Jesús; Egusquiza Estévez, Eduard (2010)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    In turbomachinery the Rotor-Stator Interaction (RSI) is an important phenomenon that has a strong influence on the machine behavior. These interactions can have a significant impact on the vibrational and acoustical ...
  • Dynamic analysis of Francis Runners-Experiment and numerical simulation 

    Lais, Stefan; Qwenguei, Liang; Henggeler, Urs; Weiss, Thomas; Escaler Puigoriol, Francesc Xavier; Egusquiza Estévez, Eduard (2009-10-01)
    Article
    Accés restringit per política de l'editorial
  • Dynamic response of a rotating disk submerged and confined. Influence of the axial gap 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Seidel, Ulrich (2016-04-01)
    Article
    Accés restringit per política de l'editorial
    In this paper, the natural frequencies and mode shapes of a rotating disk submerged and totally confined inside a rigid casing, have been obtained. These have been calculated analytically, numerically and experimentally ...
  • El Diagnóstico de daños en grupos hidroeléctricos mediante el análisis de vibraciones 

    Egusquiza Estévez, Eduard; Nascimento, Luiz de Paula do; Valero Ferrando, Ma. del Carmen; Jou Santacreu, Esteban (1994)
    Article
    Accés obert
    El análisis del comportamiento vibratorio de Grupos Hidroeléctricos se puede utilizar para el diagnóstico del estado de la máquina. Se pretende detectar daños incipientes y poder seguir la evolución del estado de la máquina ...
  • 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 ...
  • 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'editorial
    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 ...