Publication
Experimental study on the influence of abrupt slope changes on flow characteristics over stepped spillways
Related publications (47)
Experimental study on bedload pulses in a steep flume with boulders
High-velocity plunging water jets, such as those formed by spillways of high-head dams, cause scour on the rock foundations. The scour process is the result of complex physical phenomena concerning the three media involved, namely, water, rock and air. Air ...
TPU2013Air concentrations in plunge pools due to aerated plunging high-velocity jets and dynamic pressures in underlying fissures
High-velocity plunging water jets, such as those formed by spillways of high-head dams, cause scour on the rock foundations. The scour process is the result of complex physical phenomena concerning the three media involved, namely, water, rock and air. Air ...
TPI2013Hydraulic design of the diaphragm’s orifice at the entrance of the surge shaft of FMHL pumped-storage power plant
Giovanni De Cesare, Christophe Nicolet, Fadi Hachem, Rafael Xavier Meriade Duarte
The surge tank located at the upstream head of penstocks and shafts of hydropower plants is an effective measure to protect the headrace tunnels against high pressure fluctuations. It reflects the transient pressure waves that are generated by the variatio ...
TPU2013Fluid-Structure Coupling Effects on the Dynamic Response of Pump-Turbine Guide Vanes
Hydraulic pump-turbines are subject to a high periodic excitation due to the Rotor-Stator Interaction, RSI. Basically, the RSI is caused by the impeller blade passage in the wake of the guide vanes in generating mode, or upstream from the guide vanes in pu ...
EPFL2012Piano Key Weirs as efficient spillway structure
Anton Schleiss, Michael Pfister, Marcelo Leite Ribeiro
With increasing of hydrological data records and the development of technologies for flood discharge estimation, as well as higher requirements on dam safety issues, a large number of existing dams require spillway rehabilitation to improve their hydraulic ...
2012Cavitation risk estimation at orifice spillway based on UVP and dynamic pressure measurements
Giovanni De Cesare, Michael Pfister, Michael Müller, Rafael Xavier Meriade Duarte
Orifice spillways might be affected by cavitation if the profile of the inlet structure includes a relevant curvature. At one of the world’s largest dams, such damages were observed on the profiled slab. To limit their progression, an adapted operation reg ...
Departement Magnetohydrodynamics, Institute of Fluid Dynamics2012Abutment stability assessment of the Hongrin arch dam using 3D distinct element method
Azad Koliji, Jian Zhao, Thierry Bussard
The Hongrin north dam is a double curvature concrete arch dam located in western Swiss Prealps, which attains 125m high. The right bank abutment of the dam mainly consists of intensively jointed Neocomian limestone and exhibits zones of potential instabili ...
Taylor & Francis Group2012Cavitation influence on hydroacoustic resonance in pipe
François Avellan, Christophe Nicolet, Sébastien Alligné, Nicolas Ruchonnet
In pipe systems, pressure and flow fluctuations below cutoff frequency propagate as plane waves along pipes. Depending on the pipe length and propagation velocity, resonance leading to high amplitude pressure fluctuation may occur. At low pressure, cavitat ...
Elsevier2011Characterization of the Flow Generated in an Annular Test Facility
Peter Ott, Dominique Charbonnier, Elia Colombo, Cécile Deslot
Annular cascades are particularly useful to study the three dimensional phenomena encountered in turbomachines. The Non-Rotating Annular Test Facility of the Swiss Federal Institute of Technology in Lausanne (EPFL) consists in a radial-axial inlet nozzle a ...
2011Prediction of rock block stability and scour depth in plunge pools
Anton Schleiss, Matteo Paolo Elia Antonio Federspiel
Block Stability in 3 Dimensions (BS3D) is an incremental-iterative algorithm and code to analyse general failure modes of rock blocks subjected to generic forces, including non-conservative forces such as water pressure. This algorithm is used to investiga ...
2011