Numerical modeling; Physical modeling; Parametric study; Scale model
Abstract :
[en] During the last few years, several piano key weirs (PKWs) have been built in France and abroad. Thanks to the reduced footprint and high release capacities of this new type of weir, making it particularly suited for concrete dams rehabilitation, lots of other projects in various countries are under construction or study. The prototype use of PKW requires knowledge about its structural behaviour, hydraulic capacities as well as integration into dams’ environment. This paper aims at presenting numerical and physical modelling works performed at the University of Liege to address the last two items. In particular, large scale physical modelling and parametric scale models have enabled to understand the hydraulic behaviour of the structure and to highlight its most influencing geometric parameters as well as their best variation interval depending on various criteria related to the weir design (discharge efficiency, cost…). A 1D numerical model has also been developed based on these experimental investigations. It enables to predict in a few minutes, with 10% accuracy, the discharge capacity of a given PKW geometry within its usual range of operation head. This model, available as a freeware from http://www.pk-weirs.ulg.ac.be, constitutes a key tool for the first design of such weirs. Finally, the scale model studies of major projects such as Raviège dam (France) for Electricité de France - EDF and Ouldjet Mellegue Project (Algeria) for Coyne et Bellier – Tractebel Engineering enable to confront theoretical predictions with experimental results and to address the problem of PKW integration on dam crests.
Research Center/Unit :
ArGEnCo Aquapôle - ULiège
Disciplines :
Civil engineering
Author, co-author :
Erpicum, Sébastien ; Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)
Machiels, Olivier ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > HECE (Hydraulics in Environnemental and Civil Engineering)
Archambeau, Pierre ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > HECE (Hydraulics in Environnemental and Civil Engineering)
Pirotton, Michel ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > HECE (Hydraulics in Environnemental and Civil Engineering)
Dewals, Benjamin ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydraulics in Environmental and Civil Engineering
Language :
English
Title :
Hydraulic modelling of Piano Key Weirs: a composite approach
Alternative titles :
[fr] Modélisation hydraulique des déversoirs en touches de piano: une approche combinée
Publication date :
May 2012
Event name :
International workshop on Piano Key Weir for In-stream Storage and Dam Safety - PKWISD-2012
Event organizer :
Indian Water Resources Society; Indian Institute of Technology Roorkee; University of Petroleum & Energy Study, Dehradun, India
Event place :
New Delhi, India
Event date :
May 30th - June 1st, 2012
By request :
Yes
Audience :
International
Main work title :
Proceedings of International workshop on Piano Key Weir for In-stream Storage and Dam Safety - PKWISD-2012
Pages :
53-63
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture
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