Publications associées à Secondary flow

Secondary flow in sharp open-channel bends: experiments and modelling

Anton Schleiss, Alexandre Blanc, Joris Heyman

The dependence of curvature-induced secondary flow on the curvature ratio H/R and the Froude number Fr was systematically investigated in a series of 18 experiments in a sharply-curved laboratory flume. The investigated flow depths were 0.9 m, 0.13 m, 0.19 ...

2015

Secondary flow in sharp open-channel bends: experiments and modelling

Anton Schleiss, Koen Blanckaert, Joris Heyman

2015

RANS and LES computations of the tip-leakage vortex for different gap widths

Mohamed Farhat, Matthieu Dreyer

In hydraulic turbines, the tip-leakage vortex is responsible for flow instabilities and for promoting erosion due to cavitation. To better understand the tip vortex flow, Reynolds-averaged Navier-Stokes (RANS) and large eddy simulation (LES) computations a ...

Taylor & Francis2015

Wind tunnel study of a vertical axis wind turbine in a turbulent boundary layer flow

Fernando Porté Agel, Vincent François-Charles Rolin

Vertical axis wind turbines (VAWTs) are in a relatively infant state of development when compared to their cousins the horizontal axis wind turbines. Very few studies have been carried out to characterize the wake flow behind VAWTs, and virtually none to o ...

2015

Systematic errors of skin-friction measurements by oil-film interferometry

Peter Monkewitz, Jean-Daniel Rüedi

In recent years, the independent measurement of wall shear stress with oil-film or oil-drop interferometry has become a cornerstone of turbulent-boundary-layer research as many arguments depend critically on a precise knowledge of the skin friction tau(w)* ...

Cambridge University Press2015

Mind the gap: a new insight into the tip leakage vortex using stereo-PIV

Mohamed Farhat, Cécile Münch-Alligné, Matthieu Dreyer

The tip leakage vortex (TLV), which develops in the clearance between the rotor and the stator of axial hydro turbines, has been studied for decades. Yet, many associated phenomena are still not understood. For instance, it remains unclear how the clearanc ...

Springer2014

Influencing Flow Patterns and Bed Morphology in Open Channels and Rivers by Means of an Air-Bubble Screen

Anton Schleiss, Koen Blanckaert, Violaine Dugué

The ability of a bubble screen to redistribute the flow field and bed morphology in shallow rivers and open channels has been investigated in laboratory experiments. Rising air bubbles generated by a pressurized porous tube situated on the bed induced seco ...

American Society of Civil Engineers2014

Linear response to harmonic forcing of the non-parallel Batchelor vortex

François Gallaire, Francesco Viola, Cristobal Manuel Arratia Martinez

The Batchelor vortex1 is a slowly developing asymptotic solution of the flow of a trailing line vortex. This flow has been comprehensively studied in its parallel approximation. In particular, the convective/absolute nature of the instability has been inve ...

2014

Mind the gap - tip leakage vortex in axial turbines

Mohamed Farhat, Matthieu Dreyer

The tendency of designing large Kaplan turbines with a continuous increase of output power is bringing to the front the cavitation erosion issue. Due to the flow in the gap between the runner and the discharge ring, axial turbine blades may develop the so ...

Iop Publishing Ltd2014

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Secondary flow

Flow separation at convex banks in open channels

Secondary flow in sharp open-channel bends: experiments and modelling

Secondary flow in sharp open-channel bends: experiments and modelling

RANS and LES computations of the tip-leakage vortex for different gap widths

Wind tunnel study of a vertical axis wind turbine in a turbulent boundary layer flow

Systematic errors of skin-friction measurements by oil-film interferometry

Mind the gap: a new insight into the tip leakage vortex using stereo-PIV

Influencing Flow Patterns and Bed Morphology in Open Channels and Rivers by Means of an Air-Bubble Screen

Linear response to harmonic forcing of the non-parallel Batchelor vortex

Mind the gap - tip leakage vortex in axial turbines

Graph Chatbot

Chattez avec Graph Search

Linear response to harmonic forcing of the non-parallel Batchelor vortex

Flow separation at convex banks in open channels

Systematic errors of skin-friction measurements by oil-film interferometry

Mind the gap - tip leakage vortex in axial turbines

Wind tunnel study of a vertical axis wind turbine in a turbulent boundary layer flow

Secondary flow in sharp open-channel bends: experiments and modelling

RANS and LES computations of the tip-leakage vortex for different gap widths

Mind the gap: a new insight into the tip leakage vortex using stereo-PIV

Influencing Flow Patterns and Bed Morphology in Open Channels and Rivers by Means of an Air-Bubble Screen

Secondary flow in sharp open-channel bends: experiments and modelling