Publication
Air entrainment and pressure development in skimming flow on an abrupt slope change on stepped spillways
Publications associées (32)
Advances in Spillway Hydraulics: From Theory to Practice
Anton Schleiss, José Pedro Gamito de Saldanha Calado Matos
Over the past decades, significant advances have been achieved in hydraulic structures for dams, namely in water release structures such as spillway weirs, chutes, and energy dissipators. This editorial presents a brief overview of the eleven papers in thi ...
2023Plunging Circular Jets: Experimental Characterization of Dynamic Pressures Near the Stagnation Zone
Giovanni De Cesare, Pedro Filipe De Almeida Manso, Gregoire Aurelien Marie Jamet
Spillways are a requirement for dams’ safety, mainly preventing overtopping during floods. A common spillway solution involves plunging jets, which dissipate a considerable flow energy in the plunge pool. Energy dissipation has to occur in a controlled man ...
2022Bottom-Pressure Development Due to an Abrupt Slope Reduction at Stepped Spillways
Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Mohammad Javad Ostad Mirza
Fluctuating bottom-pressures on stepped chutes are relevant for the spillway design. An abrupt slope reduction causes a local alteration of the bottom-pressure development. Little information is available regarding the air–water flow properties near an abr ...
2022Plunging circular jets : Experimental characterization of dynamic pressures near the stagnation zone
Spillways are a requirement for dams' safety, mainly preventing dam over-topping in ood cases. A common spillway solution involves plunging jets which dissipate a considerable energy ow in the plunge pool. Dissipation has to occur in a controlled manner to ...
2021Hydro-mechanical coupling in porous rocks: hidden dependences to the microstructure?
While hydro-mechanical coupling in rocks is generally well understood, exotic rock poroelastic responses-such as unexpected dependence to fluid diffusion time and low skeleton moduli-have been reported. Hydro-mechanical coupling, or poroelasticity, explain ...
OXFORD UNIV PRESS2021Stilling Basin Performance Downstream of Stepped Spillways
Advances in dam construction techniques have significantly increased the number of implemented stepped spillways worldwide. A key hydraulic feature of a stepped chute, compared to a smooth chute, is the enhanced energy dissipation resulting in a reduced re ...
EPFL2020Physical Mechanism and Flow Control of Tip Vortex Cavitation
Occurrence of cavitation in hydraulic machines is a challenging issue because it is often accompanied with loss of efficiency, noise emissions, vibrations, and erosion damages. Tip vortices, in particular, are an ideal site for the development of cavitatio ...
EPFL2020Bottom pressure characteristics in a stilling basin downstream of a stepped spillway for two different chute slopes
Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Ivan Stojnic
In the last decades numerous stepped spillways were built, mostly on the downstream face of roller compacted concrete (RCC) dams. Stilling basins are often used as an energy dissipater. Although the hydraulics of stepped chutes was extensively investigated ...
The University of Queensland2020Hydraulic Jump Downstream of a Stepped Chute: An Experimental Study
Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Ivan Stojnic
The number of stepped spillways significantly increased in the past decades. Among other reasons, this is due to their energy dissipation potential leading to a reduction of the residual energy at the toe of the spillway. To date, only fragmentary designed ...
2019Two-phase flow phenomena in hydraulic turbines and pump-turbines operating in synchronous condenser mode
Hydraulic turbines and pump-turbines are often required to operate in particular conditions at which they consume active power. To keep the power consumption at a minimum, it is necessary to dewater the runner to reduce the mechanical torque. One of these ...
EPFL2018