Experimental Investigation of the Outflow Process over a Triangular Labyrinth-Weir
Publication: Journal of Irrigation and Drainage Engineering
Volume 138, Issue 1
Abstract
In this paper, the outflow process from a sharp-crested triangular labyrinth weir is studied. Applying dimensional analysis and the theorem, five dimensionless groups, describing the outflow process, are deduced. The measurements, carried out by using sharp-crested weirs placed in a flume, allowed to establish a dimensionless stage-discharge relation. According to this equation, the flow magnification is affected by either the length magnification ratio or head to one cycle width ratio. The proposed equation, which also satisfies two theoretical boundary conditions, was finally tested by using experimental measurements of different reservoir hydraulic models.
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Acknowledgments
The research was carried out with the financial support of Governo Italiano, MIUR 60%, 2007. All writers set up the research, analyzed the results, and contributed to writing the paper.
References
Cassidy, J. J., Gardner, C. A., and Peacock, R. T. (1985). “Boardman labyrinth crest spillway.” J. Hydraul. Eng., 111(3), 398–416.
Citrini, D., and Noseda, G. (1987). Idraulica, seconda edizione, Casa Editrice Ambrosiana, Milano, Italia (in Italian).
Darvas, L. A. (1971). “Discussion of ‘Performance and design of labyrinth weirs’ by N. Hay and G. Taylor.” J. Hydraul. Eng., 97(8), 1246–1251.
Emiroglu, M. E., and Baylar, A. (2005). “Influence of included angle and sill slope on air entrainment of triangular planform labyrinth weirs.” J. Hydraul. Eng., 131(3), 184–189.
Emiroglu, M. E., Kaya, N., and Agaccioglu, H. (2010). “Discharge capacity of labyrinth side weir located on a straight channel.” J. Irrig. Drain. Eng., 136(1), 37–46.
Falvey, H. T. (2003). Hydraulic design of labyrinth weirs, ASCE Press, Reston, VA, 162.
Gentilini, B. (1940). “Stramazzi con cresta a pianta obliqua e a zig-zag.” Memorie e Studi del Regio Politecnico di Milano, 48, (in Italian).
Ghodsian, M. (2009). “Stage-discharge relationship for a triangular labyrinth spillway.” Proc. Inst. Civ. Eng.Water Manage., 162(3), 173–178.
Hay, N., and Taylor, G. (1970). “Performance and design of labyrinth weirs.” J. Hydraul. Eng. 96(11), 2337–2357.
Houston, K. L. (1982). “Hydraulic model study of the Ute Dam labyrinth spillway.” USBR Rep. No. GR-82-7, Denver, CO.
Houston, K. L. (1983). “Hydraulic model study of Hyrum auxiliary labyrinth spillway.” USBR Rep. No. GR-82-13, Denver, CO.
Lopes, R., Matos, J., and Melo, J. F. (2006). “Discharge capacity and residual energy of labyrinth weirs.” Int. Junior Researcher and Engineer Workshop on Hydraulic Structures, J. Matos and H. Chanson, eds., Rep. CH61/06, Div. of Civil Eng., Univ. of Queensland, Brisbane, Australia, 47–56.
Magalhães, A. P., and Lorena, M. (1989). “Hydraulic design of labyrinth weirs.” Memoir No. 736, National Laboratory of Civil Engineering (LNEC), Portugal (in Portuguese).
Savage, B., Frizell, K., and Crowder, J. (2004). “Brains versus brawn: The changing world of hydraulic model studies.” ASDSO 2004 Annual Conf. Proc., Association of State Dam Safety Officials (ASDSO), Lexington, KY. 〈www.usbr.gov/pmts/hydraulics_lab/pubs/PAP/PAP-0933.pdf〉 (May 4, 2009).
Tacail, F. G., Evans, B., and Babb, A. (1990). “Case study of a labyrinth spillway.” Can. J. Civ. Eng., 17, 1–7.
Tullis, J. P., Amanian, N., and Waldron, D. (1995). “Design of labyrinth spillways.” J. Hydraul. Eng., 121(3), 247–255.
Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 138 • Issue 1 • January 2012
Pages: 73 - 79
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jun 14, 2010
Accepted: Apr 5, 2011
Published online: Apr 8, 2011
Published in print: Jan 1, 2012
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