Now showing items 1-19 of 19

    • A simplified methodology to evaluate the design specifications of hydraulic components 

      Roquet, Pedro; Gámez Montero, Pedro Javier; Castilla López, Roberto; Raush Alviach, Gustavo Adolfo; Codina Macià, Esteban (Multidisciplinary Digital Publishing Institute, 2018-09-11)
      Article
      Open Access
      The fatigue of a hydraulic component inherently varies due to various factors that can be divided into two categories: structural and load spectrum variability. The effects of both variabilities must be considered when ...
    • Bennet's Linkage and the Cylindroid 

      Pérez Gracia, Alba; McCarthy, John Michael (2002)
      Article
      Open Access
      Bennett’s linkage is a spatial 4R closed chain that can move with one degree of freedom. The set of relative displacement screws that form the one-dimensional workspace of this device defines a ruled surface known as a ...
    • Bond graph simulation of error propagation in position estimation of a hydraulic cylinder using low cost accelerometers 

      Algar, Antonio; Codina Macià, Esteban; Freire Venegas, Francisco Javier (2018-10-01)
      Article
      Open Access
      The indirect calculation from acceleration of transversal displacement of the piston inside the body of a double effect linear hydraulic cylinder during its operating cycle is assessed. Currently an extensive effort exists ...
    • Capacidad de carga de cilindros oleohidráulicos 

      Salazar Marín, Edgar Alonso (Universitat Politècnica de Catalunya, 2006-12-12)
      Doctoral thesis
      Open Access
      Esta tesis está relacionada con un proyecto macro cuyo título es "New design and manufacturing processes for high pressure fluid power products" -2004-2008 (acrónimo: PROHIPP), el cual es cofinanciado por la Unión Europea ...
    • Disseny d’un sistema hidràulic pel control simultani de dos actuadors situats a gran distància 

      Buch Garcia, Pau (Universitat Politècnica de Catalunya, 2013-02)
      Master thesis (pre-Bologna period)
      Open Access
    • Enumeration and limit laws of dissections on a cylinder 

      Rué Perna, Juan José (2010-09-28)
      Article
      Open Access
      We compute the generating function for triangulations on a cylinder, with the restriction that all vertices belong to its boundary and that the intersection of a pair of different faces is either empty, a vertex or an edge. ...
    • Estudio del comportamiento dinámico de un actuador lineal para mini-cargadoras 

      Alemany Juvanteny, Ignasi (Universitat Politècnica de Catalunya, 2017-06-10)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Roquet Hydraulics
      L'objectiu bàsic del TFG és l'estudi del comportament fluid-mecánio d'un cilindre hidràulic quan arriba al final de carrera.
    • Implementació del procediment d'assaig i certificació de components d'actuació d'un sistema de fre hidràulic d'un vehicle de turisme 

      Merino Giraldo, Ivan (Universitat Politècnica de Catalunya, 2018-07-02)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Applus+ IDIADA
    • Influence of rotation on the flow over a cylinder at Re=5000 

      Aljure Osorio, David E.; Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2015-10-15)
      Article
      Restricted access - publisher's policy
      The influence of the rotation ratio on the forces acting on a circular cylinder at Re ¼ 5000 has been investigated by means of direct numerical simulations (DNS). Spin ratios in the range 0-5 have been considered. The ...
    • Influence of rotation on the flow over cylinder at RE=5000 

      Aljure Osorio, David E.; Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2014)
      Conference report
      Open Access
    • Low-frequency unsteadiness in the vortex formation region of a circular cylinder 

      Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Oliva Llena, Asensio (2013-08-23)
      Article
      Open Access
      The presence of low-frequency fluctuations in the wake of bluff bodies have been observed in several investigations. Even though the flow past a circular cylinder at Re = 3900 (Re = U ref D/ν) has been the object of several ...
    • Natural convection in a laterally heated cylindrical enclosure 

      Sánchez Casals, Odalys (Universitat Politècnica de Catalunya, 2011-02-04)
      Master thesis
      Open Access
      A numerical study on the natural convection of small Prandtl number fluid in a cylindrical enclosure with lateral heating has been performed by a combination of second order time-splitting and pseudo –spectral methods. The ...
    • Numerical study of flow past circular cylinder in sub-critial range 

      Manresa Pérez, Francesc (Universitat Politècnica de Catalunya, 2014-02)
      Master thesis (pre-Bologna period)
      Open Access
      The present work discusses the validity of the 2D circular cylinder problem in sub-critical range solved with URANS approach. Fluent is used as the numerical software and results are compared in the context of previous ...
    • On the Characteristics of the Super-Critical Wake behind a Circular Cylinder 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol (Multidisciplinary Digital Publishing Institute (MDPI), 2021-11-03)
      Article
      Open Access
      The flow topology of the wake behind a circular cylinder at the super-critical Reynolds number of Re=7.2×105 is investigated by means of large eddy simulations. In spite of the many research works on circular cylinders, ...
    • Pressure-drop coefficients for cushioning system of hydraulic cylinder with grooved piston: a computational fluid dynamic simulation 

      Castilla López, Roberto; Alemany, Ignasi; Algar, Antonio; Gámez Montero, Pedro Javier; Roquet, Pedro; Codina Macià, Esteban (2017-10-25)
      Article
      Open Access
      Cushioning is an important aspect in hydraulic cylinder performance. The piston has to be decelerated before it strikes the end cap in order to avoid stresses in the cylinder components and reduce vibration that can be ...
    • Residual stresses induced by honing processes on hardened steel cylinders 

      Buj Corral, Irene; Vivancos Calvet, Joan; Setien, Iñaki; San Sebastian Ormazabal, Maria (2016-06-01)
      Article
      Restricted access - publisher's policy
      In the present paper, residual stresses induced by honing processes on hardened steel cylinders were determined. Cubic boron nitride (CBN) abrasives were employed. Both surface measurements and depth profiles were obtained ...
    • Signal-based bending stress monitoring using guided waves in hollow cylinders 

      Quiroga, Jabid; Mujica Delgado, Luis Eduardo; Villamizar Mejía, Rodolfo; Ruiz Ordóñez, Magda; Camacho-Navarro, Jhonatan (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2017)
      Conference report
      Restricted access - publisher's policy
      This work provides a time domain approach to detect stress changes in hollow cylinders using low frequency ultrasound guided waves; the proposed scheme makes uses of the subtract method for stress level estimation. Residuals ...
    • Turbulent flow around a square cylinder at Reynolds number 22,000: A DNS study 

      Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (Elsevier, 2015-12-21)
      Article
      Open Access
      The turbulent flow around a square cylinder at Reynolds number 22,000 (based on the cylinder diameter and the inflow velocity) is studied by means of direct numerical simulation. An overview of the numerical methods and ...
    • Vortex induced vibrations of a single cylinder 

      Ramos Jiménez, Antonio (Universitat Politècnica de Catalunya, 2020-10-31)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Ostbayerische Technische Hochschule Regensburg
      El objetivo principal de este trabajo es analizar el fenómeno de las vibraciones generadas por el desprendimiento de vórtices alternos que se forman cuando un fluido fluye alrededor de una estructura cilíndrica. Esto se ...