Departament de Mecànica de Fluids

Recent Submissions

  • Slingshot resonance for ocean wave energy conversion 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (Springer, 2019-06-13)
    Article
    Restricted access - publisher's policy
    The slingshot effect and its application to converting ocean wave energy are discussed. It is shown that, owing to the large inertia transported by ocean waves and their periodicity, the slingshot effect can result in the ...

  • Hydrokinetic energy conversion using compliant surfaces 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (2019-05-21)
    Article
    Restricted access - publisher's policy
    In this work, consideration is given for a novel technology based on the use of compliant surfaces (membranes) for hydrokinetic energy conversion (HEC) from residual waters where the use of traditional turbines is either ...

  • Solar thermal panels for small-medium scale air cleaners in major cities 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (2019-03-01)
    Article
    Restricted access - publisher's policy
    Air quality in major cities is reaching worrisome levels across the planet owing to large-scale industrialization. As a result, air purification systems are becoming a fertile and emerging field for research. Here, ...

  • The Extractable hydrokinetic power from an oscillating membrane-based harvester 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (Elsevier, 2019-01-22)
    Article
    Open Access
    The extractable hydrokinetic power from an oscillating membrane in standing motion and induced by a water flow and its possible significance with regard energy harvesting is discussed. The main attractiveness of such an ...

  • Hornet Vespa velutina selective capture by air entrainmen 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (2019-06-09)
    External research report
    Open Access
    In a previous report, [1], the possibility for selective capture of Vespa velutina by the use of an air cannon was discussed. In this second report, we address the alternative possibility for selective capture of ...

  • Design of a global maximum power point tracking (GMPPT) for PV array based on precise PV shadow modem 

    García-Gutiérrez, Luis; Bressan, Michael; Jiménez, Fernando; Heras Jiménez, Salvador Augusto de las; Alonso, Corinne (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
    Open Access
    This paper presents the modeling of a photovoltaic system under complex shading conditions. The approach integrates a complete PV array with each cell modeled separately including shadow coefficients depending on a ...

  • Effects of attached blade cavitation on the natural frequencies of a Francis runner 

    Escaler Puigoriol, Francesc Xavier; Huang, Xinxing (Shanghai University Press, 2019)
    Conference report
    Open Access
    Effects of attached blade cavitation on the natural frequencies of a Francis runner

  • Unsteady numerical simulation of suction side leading edge cavitation in a Francis turbine runner 

    Chen, Jian; Escaler Puigoriol, Francesc Xavier (Shanghai University Press, 2019)
    Conference report
    Open Access
    Cavitation appearance within the runner of the water turbines is a common problem that induces vibrations and provokes the erosion of the blades. Although many investigations have been carried out in simple configurations ...

  • Failure investigation of a Kaplan turbine blade 

    Zhang, Ming; Valentin, David; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard (Elsevier, 2019-03-01)
    Article
    Restricted access - publisher's policy
    In this paper, an uncommon failure of a Kaplan turbine blade has been analyzed. After the monitoring system detected a sudden increase in vibration levels, the turbine was inspected. The inspection showed that a large crack ...

  • A method for selective hornet Vespa Velutina baited traps using a compressed air cannon 

    Arias Montenegro, Francisco Javier; Heras Jiménez, Salvador Augusto de las (2019-05-28)
    External research report
    Open Access
    The efficiency and selectiveness of baited traps to control the invasive hornet Vespa velutina has been often questioned. Recent studies show that capture of Vespa velutina accounted for less than 1% of all captures, ...

  • Numerical Investigation into the Effect of Sound Speed in Attached Cavitation on Hydrofoil Modes of Vibration 

    Escaler Puigoriol, Francesc Xavier; De La Torre, Oscar (2019-05-09)
    Article
    Open Access
    It has been found recently that the dynamic behavior of a cavitating hydrofoil is di erent from that in pure water in that, not only are the natural frequencies di erent, but the mode shapes may also change. In order to ...

  • 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)
    Conference report
    Open Access
    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 ...

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