Geometric parameters influence on Piano Key Weir hydraulic performances

Erpicum, S., Archambeau, P., Pirotton, M. and Dewals, B. J. (2014). Geometric parameters influence on Piano Key Weir hydraulic performances. In: Hubert Chanson and Luke Toombes, Hydraulic structures and society - Engineering challenges and extremes. 5th IAHR International Symposium on Hydraulic Structures, Brisbane, Australia, (1-8). 25-27 June 2014. doi:10.14264/uql.2014.31

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Author Erpicum, S.
Archambeau, P.
Pirotton, M.
Dewals, B. J.
Title of paper Geometric parameters influence on Piano Key Weir hydraulic performances
Conference name 5th IAHR International Symposium on Hydraulic Structures
Conference location Brisbane, Australia
Conference dates 25-27 June 2014
Proceedings title Hydraulic structures and society - Engineering challenges and extremes
Journal name ISHS 2014 - Hydraulic Structures and Society - Engineering Challenges and Extremes: Proceedings of the 5th IAHR International Symposium on Hydraulic Structures
Place of Publication Brisbane, Australia
Publisher The University of Queensland
Publication Year 2014
Year available 2014
Sub-type Fully published paper
DOI 10.14264/uql.2014.31
Open Access Status DOI
ISBN 9781742721156
Editor Hubert Chanson
Luke Toombes
Start page 1
End page 8
Total pages 8
Language eng
Abstract/Summary The Piano Key Weir is a recent evolution of the traditional labyrinth weir. Thanks to a reduced foot print, this nonlinear weir can be placed on the top of gravity dams. The Piano Key Weir geometry involves a large number of geometric parameters. Several experimental studies have been carried out to investigate the main geometric parameters influencing the weir hydraulic efficiency and to define their optimal value. In this paper, the experimental data gathered at the University of Liege are re-examined to show how the weir height, the keys widths and the overhangs positions influence, for a given crest length magnification ratio, the weir discharge capacity. The theoretical rating curve of a standard linear weir is considered for comparison. The analysis highlights that the keys widths and overhangs lengths ratios influence significantly the Piano Key Weir efficiency, but less than the weir height. Considering the above mentioned results, a cost efficient design proposed in the literature is also proved to be close to the hydraulic optimum.
Keyword Physical modelling
Parametric study
Discharge increase ratio
Rating curve
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

 
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Created: Tue, 13 May 2014, 21:16:19 EST by Anthony Yeates on behalf of Scholarly Communication and Digitisation Service