Exploració per tema "Cavitation"

Ara es mostren els items 41-60 de 62

    • Numerical simulation of cavitation in a Francis runner under different operating conditions 

      Mundet, Agustí; Escaler Puigoriol, Francesc Xavier; Hidalgo, Víctor Hugo (Shanghai University Press, 2019)
      Text en actes de congrés
      Accés obert
      The behavior of suction side leading edge cavitation on the runner blades of the GAMM Francis turbine has been investigated under different operating conditions at the best efficiency point (BEP) and at off-design operations. ...

    • Numerical simulation of cavitation in a Venturi type section. 

      Poncon, Cyprien (Universitat Politècnica de Catalunya, 2019-07-04)
      Treball de recerca tutelat
      Accés obert
      The objective is to develop a numerical model to simulate with ANSYS the cavitation development inside a Venturi type test section under different hydrodynamic conditions. For that, a series of experimental tests carried ...

    • Numerical simulation of cavitation-erosion on a plane-convex hydrofoil using a homogeneous mixture assumption 

      Hidalgo, V.; Luo, Xianwu; Escaler Puigoriol, Francesc Xavier; Valencia, E.; Cando, E.; Yang, D. (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A better understanding of the cavitation-erosion mechanism is important to improve the prediction of the affected region under unsteady cavitation condition. For that, a new model has been proposed to estimate the microjet ...

    • Numerical simulation of the micro-jet velocity and cavitation-erosion on an axisymmetric nozzle 

      Hidalgo, V.; Escaler Puigoriol, Francesc Xavier; Luo, Xianwu; Valencia, E. (2018)
      Text en actes de congrés
      Accés obert
      The present study deals with the numerical study of the micro-jet velocity and the cavitation - erosion on an axisymmetric nozzle, which presents high ow unsteadiness and aggressiveness. The proposed model is based on ...

    • 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 ...

    • 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
      Accés obert
      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 ...

    • Pressure effects on the performance of external gear pumps under cavitation 

      Campo Sud, David del; Castilla López, Roberto; Raush Alviach, Gustavo Adolfo; Gámez Montero, Pedro Javier; Codina Macià, Esteban (2014-11)
      Article
      Accés restringit per política de l'editorial
      The numerical analysis of an external gear pump with cavitation effects has been validated with experimental data obtained by applying Time-Resolved Particle Image Velocimetry. The effect of inlet and outlet pressure on ...

    • Rapid ballast systems for the offshore hydrocarbon & renewable construction industries 

      Giramé Ibáñez, Berta (Universitat Politècnica de Catalunya / Cranfield University, 2011)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      The motions of floating structure critically influence the work that floating offshore construction vessels can carry out. In the past, the roll motions of such structures have had the most dominant influence. As a result, ...

    • Recommendations for the simulation of unsteady cloud cavitation around 2D hydrofoils with density corrected model 

      Geng, Linlin; Escaler Puigoriol, Francesc Xavier (Shanghai University Press, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Numerical simulationresultsof unsteady cavitation flowson 2D hydrofoilsdependon theselectionof the turbulence and cavitationmodelsas well as the valueof the exponential coefficient nin the Reboud’scorrection.The aim of the ...

    • 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)
      Text en actes de congrés
      Accés obert
      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. ...

    • Review of the uses of acoustic emissions in monitoring cavitation erosion and crack propagation 

      Fernández Osete, Ismael; Bermejo Plana, David; Ayneto Gubert, Javier; Escaler Puigoriol, Francesc Xavier (MDPI AG, 2024-02-24)
      Article
      Accés obert
      Nowadays, hydropower plants are being used to compensate for the variable power produced by the new fluctuating renewable energy sources, such as wind and solar power, and to stabilise the grid. Consequently, hydraulic ...

    • Scale adaptive simulation of unsteady cavitation flow around a plane convex hydrofoil with a semi-cylindrical obstacle 

      Hidalgo Díaz, Víctor Hugo; Escaler Puigoriol, Francesc Xavier; Diaz, A.; Luo, X; Simbaña, Stalyn Fabian; Marquez, D.; Hernandez, P.; Valencia, E. (Institute of Physics (IOP), 2021)
      Text en actes de congrés
      Accés obert
      The present study focuses on the numerical simulation of unsteady cavitating flow around a plane-convex hydrofoil with a semi-cylindrical obstacle, which is based on the cavitationerosion experiment perform at LMH-EPFL ...

    • Scale-adaptive simulation of unsteady cavitation around a naca66 hydrofoil 

      Hidalgo, Victor; Escaler Puigoriol, Francesc Xavier; Valencia Torres, Esteban Alejandro; Peng, Xiaoxing (Multidisciplinary Digital Publishing Institute, 2019-09-05)
      Article
      Accés obert
      Distances between consecutive aftershocks are analysed by means of mono- and multifractal theory with the aim of quantifying the complexity of the physical mechanism governing them, as well as their predictability and ...

    • Sensitivity analysis of zwart-gerber-belamri model parameters on the numerical simulation of francis runner cavitation 

      Escaler Puigoriol, Francesc Xavier; Roig Bauzà, Rafel; Hidalgo, Víctor (2018)
      Text en actes de congrés
      Accés obert
      A series of numerical simulations of the 3D cavitation development in the GAMM Francis turbine runner were carried out with the Zwart-Gerber -Belamri (ZGB) two-phase model available in ANSYS ¿ CFX v16.2. The aim of the ...

    • Simulació numèrica d'un flux amb cavitació en un tub Venturi 

      Amor Correa, Gerard (Universitat Politècnica de Catalunya, 2018-01-18)
      Treball Final de Grau
      Accés obert
      En aquest projecte l'objectiu és desenvolupar un model de cavitació en un Venturi que proporcioni uns resultats similars als experimentals. Els càlculs es realitzen amb un software de Mecànica de Fluids Computacional (CFD) ...

    • Sistema automático de instrumentación para control de aplicaciones de sonoluminiscencia 

      Arco Fernández, Eduardo Vidal (Universitat Politècnica de Catalunya, 2011-01-26)
      Treball Final de Grau
      Accés obert

    • Study of available turbulence and cavitation models to reproduce flow patterns in confined flows 

      Coussirat Núñez, Miguel Gustavo; Moll, Flavio; Cappa, E. Franco; Fontanals García, Alfred (2016-09)
      Article
      Accés restringit per política de l'editorial
      Cavitating flow in nozzles is a complex flow which implies a highly turbulent two-phase one. An accurate simulation which improves some numerical results found in the literature was achieved by means of an extensive ...

    • Study of partial cavitation on a plane-convex hydrofoil with mesh development by using gmsh free software 

      Hidalgo, Victor Hugo; Luo, Xianwu; Escaler Puigoriol, Francesc Xavier; An, Yu; Valencia, Esteban Alejandro (American Society of Mechanical Engineers, 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Commercial programs are widely used to do unstructured and structured meshes for CFD simulations. However, grids and meshes based on free-open source software (FOSS) give to researchers and engineers the possibility to ...

    • 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)
      Comunicació de congrés
      Accés obert

    • Transmission of high frequency vibrations in rotating systems. Application to cavitation detection in hydraulic turbines 

      Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (Multidisciplinary Digital Publishing Institute, 2018-03-16)
      Article
      Accés obert
      One of the main causes of damage in hydraulic turbines is cavitation. While not all cavitation appearing in a turbine is of a destructive type, erosive cavitation can severely affect the structure, thus increasing maintenance ...