Ponències/Comunicacions de congressos
Enviaments recents
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Dynamic response analysis of a reduced scale Kaplan turbine model operating in propeller mode
(IOP Publishing, 2022)
Text en actes de congrés
Accés obertIn the frame of the AFC4Hydro H2020 research project, an extensive measurement campaign has been carried out on a reduced scale Kaplan turbine model at the Vattenfall Research and Development facility in Älvkarleby, Sweden. ... -
PZT actuators as on-board instruments to reduce vibrations and strains in submerged structures
(IOP Publishing, 2022)
Text en actes de congrés
Accés obertThis paper presents the design and evaluation of an active control system to reduce vibrations and strains of submerged structures. For that, a metallic disk mounted in a test rig has been equipped with on-board waterproof ... -
Experimental investigation on the dynamic response of Pelton runners
(Institute of Physics (IOP), 2019)
Text en actes de congrés
Accés obertAn 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
(2015)
Text en actes de congrés
Accés restringit per acord de confidencialitatDetermining 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
(2021)
Text en actes de congrés
Accés obertOne 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. ... -
A novel condition monitoring methodology based on neural network of pump-turbines with extended operating range
(2019)
Text en actes de congrés
Accés obertDue 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
(2021)
Text en actes de congrés
Accés obertTo 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.
(Institute of Physics (IOP), 2019)
Text en actes de congrés
Accés obertAt 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.
(Institute of Physics (IOP), 2019)
Text en actes de congrés
Accés obertFrancis 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 ... -
Detection of erosive cavitation on hydraulic turbines through demodulation analysis
(Institute of Physics (IOP), 2018)
Text en actes de congrés
Accés obertErosive cavitation in hydraulic turbines affects severely the runner structure, increasing maintenance costs and reducing the remaining useful life of the component. Actual vibro-acoustic techniques used to detect this ... -
A mechanical assembly for experiments of Saos-2 cells under vibration actuation
(2019)
Text en actes de congrés
Accés restringit per política de l'editorialOur current experimental work investigates the influence of mechanical vibration on Saos-2 cells. We impose the vibration by using piezoelectric patches and we measure vibration response by a Laser Doppler Vibrometer. We ... -
Selection and Optimization of Sensors for Monitoring of Francis Turbines
(2021)
Text en actes de congrés
Accés obertWith the current demand of flexibility to hydraulic turbines, these are working under off-design conditions more than ever. Under these conditions different complex hydraulic phenomena appear, especially in Francis turbines, ...