Experimental parametric study and design of Piano Key Weirs

[en] Piano Key Weirs are an effective solution for dam rehabilitation as well as new dam projects with a high level of hydraulic constraints. In order to improve the efficiency of their design, an experimental study of the influence of the main geometric parameters has been performed. Thirty one configurations were tested for a wide range of discharges. The results of the study show the influence of the weir height, the keys widths and the overhangs lengths on the discharge capacity and flow characteristics. Based on hydraulic considerations, optimum values of the main geometric ratios are provided. An analytical formulation is developed to predict the discharge capacity of the weir as a function of its geometry. It shows an accuracy of 10% compared to the experimental results of this study and from other sources.

Research Center/Unit :

Aquapôle - ULiège

Disciplines :

Civil engineering

Author, co-author :

Machiels, Olivier

Pirotton, Michel ; Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)

Archambeau, Pierre ; Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)

Dewals, Benjamin ; Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering

Erpicum, Sébastien ; Université de Liège - ULiège > Scientifiques attachés au Doyen (Sc.appliquées)

Language :

English

Title :

Experimental parametric study and design of Piano Key Weirs

Alternative titles :

[fr] Etude paramétrique expérimentale et dimensionnement des déversoirs en touches de piano

Publication date :

2014

Journal title :

Journal of Hydraulic Research

ISSN :

0022-1686

eISSN :

1814-2079

Publisher :

International Association for Hydraulic Research, Delft, Netherlands

Volume :

Issue :

Pages :

326-335

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture

Available on ORBi :

since 23 May 2014

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Bibliography

Anderson, R.M., Tullis, B.P. (2011). Influence of Piano Key Weir geometry on discharge. Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2011, Liege, S. Erpicum, F. Laugier, J.-L. Boillat, M. Pirotton, B. Reverchon, A.J. Schleiss.,. eds. CRC Press, London, 75-80.
Anderson, R.M., Tullis, B.P. (2013). Piano Key Weir hydraulics and labyrinth weir comparison. J. Irrig. Drain. Eng. 139 (3), 246-253. doi: 10.1061/(ASCE)IR.1943-4774.0000530
Crookston, B., Tullis, B.P. (2010). Hydraulic performance of labyrinth weirs. Proc. 3rd International Junior Researcher and Engineer Workshop on Hydraulic Structures, Edimburg, R. Janssen, H. Chanson.,. eds. Hydraulic model report CH80/10, University of Queensland, Brisbane, 39-46.
Das Singhal, G., Sharma, N. (2011). Rehabilitation of Sawara Kuddu Hydroelectric Project-Model studies of Piano Key Weir in India. Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2011, Liege, S. Erpicum, F. Laugier, J.-L. Boillat, M. Pirotton, B. Reverchon, A.J. Schleiss.,. eds. CRC Press, London, 241-250.
Hager, W.H. (1987). Lateral outflow over side weirs. J. Hydraulic Eng. 113 (4), 491-504. doi: 10.1061/(ASCE)0733-9429(1987)113:4(491)
Ho Ta Khanh, M., Sy Quat, D., Xuan Thuy, D. (2011). P.K weirs under design and construction in Vietnam (2010). Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2011, Liege, S. Erpicum, F. Laugier, J.-L. Boillat, M. Pirotton, B. Reverchon, A.J. Schleiss.,. eds. CRC Press, London, 225-232.
Kabiri-Samani, A., Javaheri, A. (2012). Discharge coefficients for free and submerged flow over Piano Key Weirs. J. Hydraulic Res. 50 (1), 114-120. doi: 10.1080/00221686.2011.647888
Le Doucen, O., Leite Ribeiro, M., Boillat, J.-L., Schleiss, A., Laugier, F. (2009). Etude paramétrique de la capacité des PK-Weirs, Proc. Modèles physiques hydrauliques-outils indispensables du XXIe siècle, SHF, Paris. (in French).
Leite Ribeiro, M., Pfister, M., Schleiss, A.J., Boillat, J.-L. (2012a). Hydraulic design of A-type Piano Key Weirs. J. Hydraulic Res. 50 (4), 400-408. doi: 10.1080/00221686.2012.695041
Leite Ribeiro, M., Bieri, M., Boillat, J.-L., Schleiss, A.J., Singhal, G., Sharma, N. (2012b). Discharge capacity of Piano Key Weirs. J. Hydraulic Eng. 138, 199-203. doi: 10.1061/(ASCE)HY.1943-7900.0000490
Lempérière, F., Vigny, J.-P., Ouamane, A. (2011). General comments on Labyrinths and Piano Key Weirs: the past and present. Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2011, Liege, S. Erpicum, F. Laugier, J.-L. Boillat, M. Pirotton, B. Reverchon, A.J. Schleiss.,. eds. CRC Press, London, 17-24.
Machiels, O. (2012). Experimental study of the hydraulic behaviour of Piano Key Weirs. PhD thesis. HECE Research Unit, University of Liège, Belgium. http://hdl.handle.net/2268/128006.
Machiels, O., Erpicum, S., Dewals, B., Archambeau, P., Pirotton, M. (2011). Experimental observation of flow characteristics over a Piano Key Weir. J. Hydraulic Res. 49 (3), 359-366. doi: 10.1080/00221686.2011.567761
Machiels, O., Erpicum, S., Archambeau, P., Dewals, B.J., Pirotton, M. (2012). Parapet wall effect on Piano Key Weirs efficiency. J. Irrig. Drain. Eng. 139 (6), 506-511. doi: 10.1061/(ASCE)IR.1943-4774.0000566
Novak, P., Moffat, A., Nalluri, C., Narayanan, R. (1990). Hydraulic structures. Unwin Hyman, London.
Ouamane, A., Lempérière, F. (2006). Design of a new economic shape of weir. Proc. Int. Symp. Dams in the Societies of the 21 st Century, Barcelona, CIGB-ICOLD, Paris, 463-470.
Pfister, M., Schleiss, A. (2013). Estimation of A-type Piano Key weir rating curve. Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2013, Paris, S. Erpicum, F. Laugier, M. Pfister, M. Pirotton, G.-M. Cicero, A.J. Schleiss.,. eds. CRC Press, London.
Pfister, M., Erpicum, S., Machiels, O., Schleiss, A., Pirotton, M. (2012). Discharge coefficients for free and submerged flow over Piano Key Weirs-Discussion. J. Hydraulic Res. 50 (6), 642-643. doi: 10.1080/00221686.2012. 728025
Pinchard, T., Boutet, J.-M., Cicero, G.-M. (2011). Spillway capacity upgrade at Malarce dam: design of an additional Piano Key Weir Spillway. Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2011, Liege, S. Erpicum, F. Laugier, J.-L. Boillat, M. Pirotton, B. Reverchon, A.J. Schleiss.,. eds. CRC Press, London, 233-240.
Pralong, J., Vermeulen, J., Blancher, B., Laugier, F., Erpicum, S., Machiels, O., Pirotton, M., Boillat, J.-L., Leite Ribeiro, M., Schleiss, A. (2011). A naming convention for the Piano Key Weirs geometrical parameters. Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2011, Liege, S. Erpicum, F. Laugier, J.-L. Boillat, M. Pirotton, B. Reverchon, A.J. Schleiss.,. eds. CRC Press, London, 271-278.
Swiss Society of Engineers and Architects. (1926). Contribution à létude des méthodes de jaugeage. Report Bulletin 18, Swiss Bureau of Water Ressources, Bern.
Vermeulen, J., Laugier, F., Faramond, L., Gille, C. (2011). Lessons learnt from design and construction of EDF first Piano Key Weirs. Proc. Int. Work. Labyrinth and Piano Key Weirs-PKW 2011, Liege, S. Erpicum, F. Laugier, J.-L. Boillat, M. Pirotton, B. Reverchon, A.J. Schleiss.,. eds. CRC Press, London, 215-224.