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Combination of acoustic emission and vibratory measure-ments to characterize an ultrasonic vibration assisted ball burnishing tool for a lathe
(2021-07-14)
Article
Open AccessIn 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
(2022-01-22)
Article
Open AccessTo 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 ... -
Failure investigation of a solar tracker due to wind-induced torsional galloping
(Elsevier, 2022-05-01)
Article
Open AccessSolar 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 ... -
On the quantification of local power densities in a new vibration bioreactor
(Public Library of Science (PLOS), 2021-01-01)
Article
Open AccessWe investigate the power densities which are obtainable locally in a vibration bioreactor. These reactor systems are of great relevance for research about oncological or antibacterial therapies. Our focus lies on the local ... -
Nonlinear modal interaction analysis and vibration characteristics of a francis hydro-turbine generator unit
(Elsevier, 2021-05-01)
Article
Restricted access - publisher's policyThe Francis hydro-turbine generator unit (FHTGU) is a typical nonlinear system with the coupling hydraulic, mechanical and electric subsystems. It is a challenge to understand the reasons for its operational failures because ... -
Implant resonance and the mechanostat theory: Applications of therapeutic ultrasound for porous metallic scaffolds
(Elsevier, 2021-06-01)
Article
Restricted access - publisher's policyThe development of treatment strategies for improving secondary stability at the bone-implant interface is a challenge. Porous implants are one solution for improving long-term implant stability, but the osteoconduction ... -
On the use of neural networks for dynamic stress prediction in Francis turbines by means of stationary sensors
(Elsevier, 2021-06-01)
Article
Restricted access - publisher's policyNowadays, one of the major mechanical issues of hydraulic turbines and particularly Francis turbines are the failures produced by fatigue. Due to the massive entrance of new renewable energies such as wind or solar, hydraulic ... -
Multi-objective optimization of a hydro-wind-photovoltaic power complementary plant with a vibration avoidance strategy
(2021-11-01)
Article
Restricted access - publisher's policyHydropower has the advantages of quickly responding to load variability, which overcomes the unpredictable and unstable variabilities of solar and wind power. Therefore, such power generation can be combined into a ... -
A review of dynamic models and stability analysis for a hydro-turbine governing system
(2021-07)
Article
Restricted access - publisher's policyHydropower offers highly flexible, low-carbon generation that can be used to balance electricity grids with high levels of wind and solar penetration. This will become increasingly important as the energy transition unfolds. ... -
Transient analysis to air chamber and orifice surge tanks in a hydroelectric generating system during the successive load rejection
(Elsevier, 2021-09-15)
Article
Restricted access - publisher's policySurge tank is an essential device to control hydraulic transient of a Hydroelectric Gnerating Systems (HGS)s. However, various types of surge tanks differently reflect in reducing water hammer and improve performance of ... -
Characterization of the effects of ingested bodies on the rotor–stator interaction of hydraulic turbines
(2021-10-14)
Article
Open AccessRunner and distributor blockages in hydraulic turbines occur due to the ingestion of external bodies such as rocks or logs. These obstructions can change the amplitude and uniformity of the pressure pulsations in the ... -
Improved damage detection in Pelton turbines using optimized condition indicators and data-driven techniques
(2021-01-07)
Article
Open AccessThe health condition of hydraulic turbines is one of the most critical factors for the operation safety and financial benefits of a hydro power plant. After the massive entrance of intermittent renewable energies, hydropower ...
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