Browsing by Author "Farhat, Mohamed"

Now showing items 1-10 of 10

    • 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)
      Conference report
      Restricted access - publisher's policy
      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 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)
      Conference lecture
      Restricted access - publisher's policy
      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 ...

    • 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)
      Conference lecture
      Open Access
      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 ...

    • 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 ...

    • Experimental mode shape determination of a cantilevered hydrofoil under different flow conditions 

      De la Torre Rodriguez, Oscar; Escaler Puigoriol, Francesc Xavier; Egusquiza Estévez, Eduard; Farhat, Mohamed (2016-12-01)
      Article
      Open Access
      The first three mode shapes of a cantilevered NACA0009 hydrofoil were experimentally investigated in air and under different flow conditions in a cavitation tunnel. First and second bending modes and first torsion mode ...

    • Machine learning for knowledge acquisition and accelerated inverse-design for non-Hermitian systems 

      Ahmed, Waqas W.; Farhat, Mohamed; Staliunas, Kestutis; Zhang, Xiangliang; Wu, Ying (2023-01-03)
      Article
      Open Access
      Non-Hermitian systems offer new platforms for unusual physical properties that can be flexibly manipulated by redistribution of the real and imaginary parts of refractive indices, whose presence breaks conventional wave ...

    • Modal behavior of a reduced scale pump-turbine impeller. Part I. Experiments 

      Escaler Puigoriol, Francesc Xavier; Hutter, J.K.; Egusquiza Estévez, Eduard; Farhat, Mohamed; Avellan, F. (2010)
      Conference lecture
      Restricted access - publisher's policy
      An experimental investigation has been carried out to quantify the effects of surrounding fluid on the modal behavior of a reduced scale pump-turbine impeller. The modal properties of the fluid-structure system have been ...

    • Modal behavior of a reduced scale pump-turbine impeller. Part II. Numerical Simulation 

      Valero Ferrando, Ma. del Carmen; Huang, Xingxing; Egusquiza Estévez, Eduard; Farhat, Mohamed; Avellan, François (2010)
      Conference lecture
      Restricted access - publisher's policy
      A numerical simulation has been carried out to analyze the modal behavior of a reduced scale pump-turbine impeller. The simulation has been done using FEM method, in air and in water. The same boundary conditions than ...

    • Review of parameters influencing the structural response of a submerged body under cavitation conditions 

      Escaler Puigoriol, Francesc Xavier; De la Torre Rodriguez, Oscar; Farhat, Mohamed (Institute of Physics (IOP), 2015)
      Conference report
      Open Access
      Submerged structures that operate under extreme flows are prone to suffer large scale cavitation attached to thei r surfaces. Under such conditions the added mass effects differ from the expected ones in pure liquids. ...

    • 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