Reference : Pressure and velocity on an ogee spillway crest operating at high head ratio: experim...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/184294
Pressure and velocity on an ogee spillway crest operating at high head ratio: experimental measurements and instrumentation
English
[en] Pression et vitesse à la crête d'un déversoir standard fonctionnant sous haut rapport de charge: mesures expérimentales et validation
Peltier, Yann mailto [Université de Liège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering >]
Dewals, Benjamin mailto [Université de Liège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering >]
Archambeau, Pierre mailto [Université de Liège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering) >]
Pirotton, Michel mailto [Université de Liège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering) >]
Erpicum, Sébastien mailto [Université de Liège > > Scientifiques attachés au Doyen (Sc.appliquées) >]
2015
2nd International workshop on hydraulic structures: data validation
Carvalho, Rita
Pagliara, Stefano
11-20
Yes
International
9789892057927
2nd International workshop on hydraulic structures: data validation
7-9 May 2015
Hydraulic Structures Technical Commitee of IAHR
University of Coimbra
MARE Research Center
Coimbra
Portugal
[en] ogee-crested weir ; LSPIV ; physical modeling ; potential flow theory ; pressure sensors ; scale model
[en] This paper aims at validating pressure and velocity measurements conducted in two physical scale models of an ogee spillway crest operating at heads largely greater than the design head. The design head of the second model is 50% smaller than the one of the first model. No piles effect or air entrance is considered in the study. The velocity field is measured by Large Scale Particle Image Velocimetry. The relative pressure along the spillway crest is measured using pressure sensors. Comparisons of measured velocities between both spillways indicate low scale effects, the scaled-profiles collapsing in most parts of the flow. By contrast, measurements of relative pressure along the spillway crest differ for large heads. A theoretical velocity profile based on potential flow theory and expressed in a curvilinear reference frame is then fitted to the velocity measurements, considered as reference, for extrapolating the velocity at the spillway crest. Comparing the extrapolated velocity at the spillway crest and the velocity expressed from the relative pressure finally emphasizes that bottom pressure amplitudes are overestimated for the large spillway, while an averaging effect might operate for the pressure measurements on the small spillway.
Aquapôle - AQUAPOLE
Researchers ; Professionals
http://hdl.handle.net/2268/184294

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