Unit
Hydraulic Machines Platform - Administration
CenterRelated publications (498)
Dynamic stall characterisation and control for vertical-axis wind turbines
According to the International Energy Agency, the global net-zero emissions objective requires the installed wind power capacity to increase 11-fold between 2020 and 2050. The scientific community has recently voiced concerns about the logistic feasibility ...
EPFL2023Structural impact of the start-up sequence on Pelton turbines lifetime: Analytical prediction and polynomial optimization
Mario Paolone, Elena Vagnoni, Aldo Leonardo Alerci
Hydropower plants play a crucial role in the power system facing ambitious renewable energy targets. Due to their inherent controllability, they are well suited to provide flexibility to the grid. However, an increased flexibility provision leads to a prol ...
2023Cross-code verification of non-neutral ABL and single wind turbine wake modelling in LES
Fernando Porté Agel, Marwa Souaiby
Large Eddy Simulations (LES) of atmospheric boundary layer (ABL) flow with the actuator disc (AD) for turbine modelling is a widely used method of simulating wind farm flows. Hence, it is important to understand the requirements for achieving a good compar ...
IOP PUBLISHING LTD2023Design, computational and experimental investigation of a small-scale turbopump for organic Rankine cycle systems
Jürg Alexander Schiffmann, Sajjad Zakeralhoseini
The hydraulic design, computational analysis, and experimental investigations of a high-speed small-scale turbopump for mobile waste heat recovery applications based on organic Rankine cycle systems are presented in this paper. Such applications demand hig ...
2023Wind Turbine Wakes in Active Yaw Control: Numerical and Theoretical Studies
In this thesis, we explore the best practice of simulating the wakes of the turbines under active yaw control (AYC) using large-eddy simulation (LES). In the first study, we validate the blade-element actuator disk model (ADM-BE) for a yawed wind turbine. ...
EPFL2023Time scales of dynamic stall development on a vertical-axis wind turbine blade
Karen Ann J Mulleners, Sébastien Le Fouest, Daniel Marie Fernex
Vertical-axis wind turbines are excellent candidates to diversify wind energy technology, but their aerodynamic complexity limits industrial deployment. To improve the efficiency and lifespan of vertical-axis wind turbines, we desire data-driven models and ...
2023Numerical study on the scale effect of tip vortex cavitation induced by incoming velocities and scale ratios
Mohamed Farhat, Huaiyu Cheng, Mohan Xu
Large eddy simulations of tip vortex cavitation (TVC) around an elliptical hydrofoil is performed to study its scale effect. A satisfying agreement is obtained between the numerical and experimental data. It indicates that the scale effect of TVC is remark ...
PERGAMON-ELSEVIER SCIENCE LTD2023Optimal blade pitch control for enhanced vertical-axis wind turbine performance
Karen Ann J Mulleners, Sébastien Le Fouest
Vertical-axis wind turbines are great candidates to enable wind power extraction in urban and off-shore applications. Currently, concerns around turbine efficiency and structural integrity limit their industrial deployment. Flow control can mitigate these ...
2023Enhancing Flood Resilience: Sediment Management in Le Bez Torrent
Giovanni De Cesare, Azin Amini, Romain Nathan Hippolyte Merlin Van Mol
In the canton of Bern, Switzerland, the “Le Bez” torrent is known for its flash floods, causing sediment and wood debris buildup in Villeret village settled on the alluvial fan. To mitigate this issue, a sediment/wood trap system is being implemented upstr ...
Swiss Academy of Sciences (SCNAT)2023CFD simulations of hydraulic short-circuits in junctions, application to the Grand’Maison power plant
In the framework of the XFLEX HYDRO H2020 European Project, the pumped-storage power plant of Grand'Maison (France), owned by Electricité De France, focuses on the implementation of the hydraulic short-circuit (HSC) operating mode. This mode increases the ...
2022