Publications associées à Ressaut hydraulique

Identification of the wave speed and the second viscosity of cavitation flows with 2D RANS computations - Part I

1D hydro-electric models are useful to predict dynamic behaviour of hydro-power plants. Regarding vortex rope and cavitation surge in Francis turbines, the 1D models require some inputs that can be provided by numerical simulations. In this paper, a 2D cav ...

Iop Publishing Ltd2015

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

François Avellan, Christophe Nicolet, Arthur Tristan Favrel, Christian Landry, Andres Müller, Keita Yamamoto

Hydraulic machines operating in a wider range are subjected to cavitation developments inducing undesirable pressure pulsations which could lead to potential instability of the power plant. The occurrence of pulsating cavitation volumes in the runner and t ...

IOP Publishing Ltd2014

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

François Avellan, Christophe Nicolet, Arthur Tristan Favrel, Christian Landry, Keita Yamamoto

Iop Publishing Ltd2014

Elasto-Dynamic Behavior of a Two-Dimensional Square Lattice With Entrained Fluid II: Microstructural and Homogenized Models

Alessandro Spadoni, Vladimir Dorodnitsyn

This paper presents a detailed study of the pressure waves and effective mechanical properties of a closed-cell cellular solid with entrained fluid. Plane-harmonic-waves are analyzed in a periodic square with a finite-element model of a representative-volu ...

Asme2014

Hydraulic 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 ...

TPU2013

Shear velocity estimates in rough-bed open-channel flow

Ulrich Lemmin, Fereshteh Bagherimiyab Hunkeler

Shear velocity u(*) is an important parameter in geophysical flows, in particular with respect to sediment transport dynamics. In this study, we investigate the feasibility of applying five standard methods [the logarithmic mean velocity profile, the Reyno ...

Wiley-Blackwell2013

Dynamic pressure distribution around a fixed confined block impacted by plunging and aerated water jets

Anton Schleiss, Rafael Xavier Meriade Duarte

The scour process created by the impingement of high-velocity water jets on fissured rock is the result of complex physical phenomena. Of great importance are the jet development during the trajectory through the atmosphere, the diffusion process inside th ...

TUP2013

The role of turbulence in the hydraulic environment of benthic invertebrates

Koen Blanckaert, Ana Margarida Da Costa Ricardo

The role of turbulence in the dislodgment of benthic stream invertebrates from the riverbed was investigated experimentally in a laboratory flume. For the first time, technological advances allowed measuring the spatio-temporal patterns of turbulent flow a ...

Wiley-Blackwell2012

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Ressaut hydraulique

Identification of the wave speed and the second viscosity of cavitation flows with 2D RANS computations - Part I

Keynote lecture - Potential, limits and perspectives of physical and numerical modelling

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Comoving frames and symmetry-related motions in parallel shear flows

Elasto-Dynamic Behavior of a Two-Dimensional Square Lattice With Entrained Fluid II: Microstructural and Homogenized Models

Hydraulic design of the diaphragm’s orifice at the entrance of the surge shaft of FMHL pumped-storage power plant

Shear velocity estimates in rough-bed open-channel flow

Dynamic pressure distribution around a fixed confined block impacted by plunging and aerated water jets

The role of turbulence in the hydraulic environment of benthic invertebrates

Graph Chatbot

Chattez avec Graph Search

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Identification of the wave speed and the second viscosity of cavitation flows with 2D RANS computations - Part I

Keynote lecture - Potential, limits and perspectives of physical and numerical modelling

Comoving frames and symmetry-related motions in parallel shear flows

Hydraulic design of the diaphragm’s orifice at the entrance of the surge shaft of FMHL pumped-storage power plant

Elasto-Dynamic Behavior of a Two-Dimensional Square Lattice With Entrained Fluid II: Microstructural and Homogenized Models

Shear velocity estimates in rough-bed open-channel flow

Dynamic pressure distribution around a fixed confined block impacted by plunging and aerated water jets

The role of turbulence in the hydraulic environment of benthic invertebrates