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Hydraulic behavior of Piano Key Weirs: experimental approach
Machiels, Olivier; Erpicum, Sébastien; Archambeau, Pierre et al.
2010In Janssen, Robert; Chanson, Hubert (Eds.) 3rd Int. Junior Researcher and Engineer Worjshop on Hydraulic Structures
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Keywords :
PKW; Experimental; weir
Abstract :
[en] The Piano Key Weir (PKW) is a particular geometry of weir similar to a labyrinth shape that features overhanging cycle ends to reduce the base length. Together with its high discharge capacity for low heads, this geometric feature makes the PKW an interesting solution for dam rehabilitation, permitting the placement of the weir directly on dam crest. However, PKW stays a new type of weir, firstly designed in 2001 and built for the first time in 2006 by Electricité de France (EDF). Even if the first experimental studies confirmed its discharge capacities, lacks persist in the understanding of the flow behaviour upstream, along and downstream of this complex structure. This paper presents the mean results and observations obtained from experiments on a large scale model of PKW. The hydraulics of the structure is clarified based on measurements of water depths, pressures, velocities and discharges on each part of the weir. These observations explain the effect of geometric improvements proposed in former studies.
Research center :
Aquapôle - ULiège
Disciplines :
Civil engineering
Author, co-author :
Machiels, Olivier ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Erpicum, Sébastien  ;  Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)
Archambeau, Pierre  ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Dewals, Benjamin  ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Pirotton, Michel ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Language :
English
Title :
Hydraulic behavior of Piano Key Weirs: experimental approach
Publication date :
May 2010
Event name :
3rd Int. Junior Researcher and Engineer Worjshop on Hydraulic Structures
Event place :
Edinbourg, United Kingdom
Event date :
1 - 4 May 2010
Audience :
International
Main work title :
3rd Int. Junior Researcher and Engineer Worjshop on Hydraulic Structures
Editor :
Janssen, Robert
Chanson, Hubert
Peer reviewed :
Peer reviewed
Available on ORBi :
since 14 October 2010

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