Article (Scientific journals)
Pressure and velocity on an ogee spillway crest operating at high head ratio: experimental measurements and validation
Peltier, Yann; Dewals, Benjamin; Archambeau, Pierre et al.
2018In Journal of Hydro-Environment Research, 19, p. 128-136
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Keywords :
ogee-crested weir; Bubbles Image Velocimetry; physical modeling; potential flow theory; pressure sensors; scale model
Abstract :
[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 pier effect or air venting is considered in the study. The velocity field is measured by Bubbles Image Velocimetry. The relative pressure along the spillway crest is measured using pressure sensors. Comparison of measured velocities between both spillways indicates 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 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 calculated from the relative pressure considering a potential flow finally emphasizes that bottom pressure amplitudes seem overestimated for the larger spillway, while an averaging effect might operate for the pressure measurements on the smaller spillway.
Research center :
UEE - Urban and Environmental Engineering - ULiège
Disciplines :
Civil engineering
Author, co-author :
Peltier, Yann;  Ecole des Ponts, CEREMA, EDF R&D > Laboratoire d’Hydraulique Saint-Venant (LHSV)
Dewals, Benjamin  ;  Université de Liège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering
Archambeau, Pierre  ;  Université de Liège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Pirotton, Michel ;  Université de Liège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Erpicum, Sébastien  ;  Université de Liège > Scientifiques attachés au Doyen (Sc.appliquées)
Language :
English
Title :
Pressure and velocity on an ogee spillway crest operating at high head ratio: experimental measurements and validation
Publication date :
March 2018
Journal title :
Journal of Hydro-Environment Research
ISSN :
1570-6443
eISSN :
1876-4444
Publisher :
Elsevier, Netherlands
Volume :
19
Pages :
128-136
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 April 2017

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