La recerca del CDIF està relacionada amb el comportament dinàmic d'estructures confinades excitades per fluids. La recerca del comportament dinàmic requereix del estudi de les excitacions generades per un fluid i la resposta estructural per determinar els comportaments vibratoris i les deformacions. L'aplicació principal està en les turbomàquines hidràuliques (sector energies renovables).

Recent Submissions

  • The potential for photovoltaic-powered pumped-hydro systems to reduce emissions, costs, and energy insecurity in rural China 

    Yang, Zongru; Sun, Guoxiu; Behrens, Paul; Østergaard, Poul Alberg; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Xu, Beibei; Chen, Diyi; Patelli, Edoardo (Elsevier, 2021-09)
    Article
    Open Access
    Homes in rural China often have access to water wells for domestic and agricultural use. Given the significant difference in height between the well water and the roof of the house, such an arrangement could be used as a ...
  • Exploring the Regulation Reliability of a Pumped Storage Power Plant in a Wind–Solar Hybrid Power Generation System 

    Xu, Beibei; Zhang, Jingjing; Egusquiza Montagut, Mònica; Zhang, Junzhi; Chen, Diyi; Egusquiza Estévez, Eduard (2021-09-17)
    Article
    Open Access
    In the coming decades, the proportion of wind–solar energy in power system significantly increases, resulting to uncertainties of power fluctuation in abundant wind–solar energy regions. The flexibility operation of Pumped ...
  • Combination of acoustic emission and vibratory measure-ments to characterize an ultrasonic vibration assisted ball burnishing tool for a lathe 

    Fernández Osete, Ismael; Estévez Urra, Aida; Velázquez Corral, Eric; Valentín Ruiz, David; Llumà Fuentes, Jordi; Jerez Mesa, Ramón; Travieso Rodriguez, Jose Antonio (2021-07-14)
    Article
    Open Access
    In this paper, a resonant system that produces a movement of low amplitude and ultrasonic frequency is used to achieve the vibration assistance in a ball-burnishing process. A full vibration characterization of this process ...
  • On the use of vibrational hill charts for improved condition monitoring and diagnosis of hydraulic turbines 

    Zhao, Weiqiang; Presas Batlló, Alexandre; Egusquiza Montagut, Mònica; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen (2022-01-22)
    Article
    Open Access
    To cope with the intermittent power supply of the new renewable energies and demand fluctuations, Francis turbines are required to operate more and more in an extended operating range, far away from the design point. With ...
  • Experimental investigation on the dynamic response of Pelton runners 

    Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard (Institute of Physics (IOP), 2019)
    Conference report
    Open Access
    An effective condition monitoring is essential to increase the availability of Pelton turbines and to avoid unexpected damage. The main challenge consists in determining the deformations and the stresses in the runner while ...
  • On the exctitation of a submerged disk-like structure with RSI patterns 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Seidel, Ulrich (2015)
    Conference report
    Restricted access - confidentiality agreement
    Determining the dynamic response of submerged and confined disk-like structures is of interest in the hydraulic turbines field. Disks present similar dynamic characteristics than hydraulic turbine runners, especially in ...
  • Transient Analysis of Pelton Turbine Prototypes 

    Egusquiza Montagut, Mònica; Valentín Ruiz, David; Valero Ferrando, Ma. del Carmen; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard (2021)
    Conference report
    Open Access
    One of the most critical operating conditions in hydraulic turbines is the start-up transient. This may be characterized by the presence of several resonances, which increase the vibration and stress levels on the runners. ...
  • Failure investigation of a solar tracker due to wind-induced torsional galloping 

    Valentín Ruiz, David; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Presas Batlló, Alexandre (Elsevier, 2022-05-01)
    Article
    Open Access
    Solar power installations are increasing every year due to the decarbonization policy established around the world. Photovoltaic (PV) systems and specifically one-axis solar trackers are the most used type of installations ...
  • A novel condition monitoring methodology based on neural network of pump-turbines with extended operating range 

    Zhao, Weiqiang; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Valentín Ruiz, David; Presas Batlló, Alexandre (2019)
    Conference report
    Open Access
    Due to the entrance of new renewable energies, water-storage energy has to be regulated more frequently to keep the stability of power grid. Consequently, pump-turbines have to work under offdesign conditions more than ...
  • Natural frequencies of rotating disk-like structures submerged viewed from the stationary frame 

    Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Estévez, Eduard; Valero Ferrando, Ma. del Carmen; Seidel, Ulrich (2021)
    Conference report
    Open Access
    To understand the effect of rotation in the dynamic response of pump-turbine runners, simplified models such as disk-like structures can be used. In previous researches the natural frequencies and mode shapes of rotating ...
  • Behavior of Francis turbines at part load. Field assessment in prototype: Effects on the hydraulic system. 

    Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Estévez, Eduard (Institute of Physics (IOP), 2019)
    Conference report
    Open Access
    At present, hydropower plants play an important role because of their flexibility in the generation of electricity. Today, the required operating range of turbine units is expected to extend to deep part load. At part load ...
  • Behavior of Francis turbines at part load. Field assessment in prototype: Effects on power swing. 

    Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (Institute of Physics (IOP), 2019)
    Conference report
    Open Access
    Francis turbines are increasingly demanded to work at part load in order to satisfy the electricity generation demand and to compensate the non-constant generation of other renewable sources such as wind or solar. At part ...

View more