Diseño hidráulico de vertedores escalonados con pendientes moderadas: Metodología basada en un estudio experimental

Gonzalez, Carlos A. and Hubert Chanson (2007) Diseño hidráulico de vertedores escalonados con pendientes moderadas: Metodología basada en un estudio experimental. Ingenieria Hidraulica en Mexico, 22 2: 5-20.

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Author Gonzalez, Carlos A.
Hubert Chanson
Title Diseño hidráulico de vertedores escalonados con pendientes moderadas: Metodología basada en un estudio experimental
Formatted title
Hydraulic design of embankment stepped chutes: a methodology based on an experimental study
Journal name Ingenieria Hidraulica en Mexico
ISSN 0020-1057
Publication date 2007-04-23
Sub-type Article (original research)
Open Access Status File (Author Post-print)
Volume 22
Issue 2
Start page 5
End page 20
Total pages 16
Editor A. A. A. Rodriguez
Place of publication Morelos
Publisher Instituto Mexicano Technologiaagua
Subject 290000 Engineering and Technology
290800 Civil Engineering
290802 Water and Sanitary Engineering
290899 Civil Engineering not elsewhere classified
291100 Environmental Engineering
291101 Environmental Engineering Modelling
291800 Interdisciplinary Engineering
291803 Turbulent Flows
300000 Agricultural, Veterinary and Environmental Sciences
300100 Soil and Water Sciences
300105 Applied Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
Abstract Durante las últimas tres décadas el interés y diversidad en el uso de canales escalonados han aumentado debido al desarrollo de nuevas técnicas y materiales que permiten su construcción de manera rápida y económica (Concreto compactado con rodillo CCR, Gaviones, etc.). Actualmente, los canales escalonados se usan como vertedores y/o canales para peces en presas y diques, como disipadores de energía en canales y ríos, o como aireadores en plantas de tratamiento y torrentes contaminados. Diversos investigadores han estudiado el flujo en vertedores escalonados, enfocándose en estructuras de gran pendiente (  45o) por lo que a la fecha, el comportamiento del flujo sobre vertedores con pendientes moderadas (  15 a 30o) no ha sido totalmente comprendido. El presente artículo comprende un estudio experimental de las propiedades físicas del flujo aire-agua sobre canales escalonados con pendientes moderadas, típicas en presas de materiales sueltos. Un extenso rango de gastos en condiciones de flujo rasante se investigó en dos modelos experimentales a gran escala (Le = 3 a 6): Un canal con pendiente 3.5H:1V (  16o) y dos alturas de escalón distintas (h = 0.1 y 0.05 m) y un canal con pendiente 2.5H:1V (  22o) y una altura de escalón de h = 0.1 m. Los resultados incluyen un análisis detallado de las propiedades del flujo en vertedores escalonados con pendientes moderadas y un nuevo criterio de diseño hidráulico, el cual está basado en los resultados experimentales obtenidos. English abstract: Stepped chutes have been used as hydraulic structures since antiquity, they can be found acting as spillways and fish ladders in dams and weirs, as energy dissipators in artificial channels, gutters and rivers, and as aeration enhancers in water treatment plants and polluted streams. In recent years, new construction techniques and materials (Roller Compacted Concrete RCC, rip-rap gabions, etc.) together with the development of the abovementioned new applications have allowed cheaper construction methods, increasing the interest in stepped chute design. During the last three decades, research in stepped spillways has been very active. However, studies prior to 1993 neglected the effect of free-surface aeration. A number of studies have focused since on steep stepped chutes (  45o) but the hydraulic performance of moderate-slope stepped channels is not yet totally understood. This study details an experimental investigation of physical air-water flow properties down moderate slope stepped spillways conducted in two laboratory models: the first model was a 3.15 m long stepped chute with a 15.9o slope comprising two interchangeable step heights (h = 0.1 m and h = 0.05 m); the second model was a 3.3 m long, stepped channel with a 21.8o slope (h = 0.1 m). A broad range of discharges within transition and skimming flow regimes was investigated. Measurements were conducted using a double tip conductivity probe. The study provides new, original insights into air-water stepped chute flows not foreseen in prior studies and presents a new design criterion for chutes with moderate slopes based on the experimental results.
Keyword vertedores escalonados
flujo aire-agua
flujo rasante
vórtices recirculantes
intercambio de momentum
modelos físicos
stepped chutes
aerated flow
skimming flow
flow recirculation
momentum exchange
physical modelling
References Amador , A. (2005). "Comportamiento hidráulico de los aliviaderos en presas de hormigón compactado," PhD, UPC, Barcelona. Amador , A., Sanchez-Juny, M., Dolz, J., Sanchez-Tembleque, F., and Puertas, J.(2004). "Velocity and pressure measurements in skimming flows in stepped spillways." Intl. conf. on hydraulics of dams and river structures, Teheran, Iran. Beitz , E., and Lawless, M. (1992). "Hydraulic Model Study for Dam on GFHL 3791 Isaac River at Burton Gorge." REP/24.1, Water Resources Commission, Brisbane. Bindo, M., Gautier, J., and Lacroix, F. (1993). "The Stepped Spillway of M'Bali Dam." Water Power and Dam Construction, 45(1), 35-46. Chamani, M. R., and Rajaratnam, N. (1994). "Jet Flow on Stepped Spillways." Journal of Hydraulic Engineering-ASCE, 125(9), 969-971. Chamani, M. R., and Rajaratnam, N. (1999a). "Characteristics of Skimming Flow over Stepped Spillways." Journal of Hydraulic Engineering-ASCE, 125(4), 361-368. Chamani, M. R., and Rajaratnam, N. (1999b). "Onset of Skimming Flow on Stepped Spillways." Journal of Hydraulic Engineering-ASCE, 125(9), 969-971. Chanson, H. (1995). Hydraulic Design of Stepped Cascades, Channels, Weirs and Spillways, Pergamon, Oxford, UK. Chanson, H. (1997). "Flow Aeration at Stepped Cascades." CE155, Department of Civil Engineering, The University of Queensland, Brisbane. Chanson, H. (2002). The hydraulics of stepped chutes and spillways, A. A. Balkema Publishers, Lisse,. Chanson, H., and Toombes, L. (2001). "Experimental Investigations of Air Entrainment in Transition and Skimming Flows down a Stepped Chute: Application to Embankment Overflow Stepped Spillways." CE 158, Dept. of Civil Engineering,University of Queensland, Brisbane, Australia. Chanson, H., and Toombes, L. (2002). "Air-water Flows Down Stepped Chutes: Turbulence and Flow Structure Observations." Intl. Journal of Multiphase Flow, 28(11), 1737-1761. Chanson, H., and Toombes, L. (2004). "Experimental Study of Gas-liquid Interfacial Properties." Environmental Fluid Mechanics, 2, 241-263. Chanson, H., Yasuda, Y., and Ohtsu, I. (2002). "Flow Resistance in Skimming Flows in Stepped Spillways and its Modelling." Canadian Journal of Civil Engineering, 29(6), 809-819. Crowe, C. T., Sommerfeld, M., and Tsuji, Y. (1998). Multiphase Flows with Droplets and Particles, CRC Press, Boca Raton, USA. Elviro, V., and Mateos, C. (1995). "Spanish Research into Stepped Spillways." Intenational Journal of Hydropower and Dams, 2(5), 61-65. Frizzell, K. H., and Mefford, B. W. (1991). "Designing Spillways to Prevent Cavitation Damage." Concrete International, 13(5), 58-64. Gonzalez, C. A. (2005). "An experimental study of free-surface aeration on embankment stepped chutes," Thesis (Ph.D.) - University of Queensland, 2005. Kobus, H.(1984). "Local Air Entrainment and Detrainment." International Symposium on Scale Effects in Modelling Hydraulic Structures IAHR, Esslingen, Germany. Matos, J.(2000). "Hydraulic Designof Stepped Spillways over RCC Dams." Intl. Workshop on Hydraulics of Stepped Spillways, Zurich, Switzerland, 187-194. Matos, J. (2001). "Onset of Skimming Flow on Stepped Spillways - Discussion." Journal of Hydraulic Engineering-Asce, 127(6), 519-521. Ohtsu, I., and Yasuda, Y.(1997). "Characteristics of Flow Conditions on Stepped Channels." IAHR Biennial Congress, San Francisco, USA. Ohtsu, I., Yasuda, Y., and Takahashi, M. (2004). "Flow Characteristics of Skimming Flows in Stepped Channels." Journal of Hydraulic Engineering-ASCE, 130(9), 860-869. Peyras, L., Royet, P., and Degoutte, G. (1992). "Flow and Energy-Dissipation over Stepped Gabion Weirs." Journal of Hydraulic Engineering-ASCE, 118(5). Rajaratnam, N. (1990). "Skimming Flow in Stepped Spillways." Journal of Hydraulic Engineering-Asce, 116(4), 587-591. Sorensen, R. M. (1985). "Stepped Spillway Hydraulic Model Investigation." Journal of Hydraulic Engineering-ASCE, 111(12), 1461-1472. Toombes, L. (2002). "Experimental Study of Air-water Flow Properties on Low-gradient Stepped Cascades," Ph.D, The University of Queensland, Brisbane. Toombes, L., and Chanson, H.(2000). "Air-water Flow and Gas Transfer at Aeration Cascades: A Comparative Study of Smooth and Stepped Chutes." International workshop on Hydraulics of Stepped Spillways, Zurich, Switzerland, 77-84. Tozzi, M. J. (1992). "Caracterizacao/Comportamento de Escoamentos en Vertedouros com Paramento em Degraus," Ph.D, University of Sao Paulo, Sao Paulo. Wood, I. R. (1991). Air Entrainment in Free-Surface Flows, Balkema, Rotterdam, The Netherlands. Yasuda, Y., and Ohtsu, I.(1999). "Flow Resistance of Skimming Flow in Stepped Channels." Proc. 28th IAHR Congress, Graz, Austria. Yasuda, Y., Ohtsu, I., and Takahashi, M.(2001). "Energy Dissipation of Skimming Flows on Stepped-channel Chutes." 29th IAHR Biennial Congress, Beijing, China.
Q-Index Code C1
Additional Notes The full bibliographic details are : GONZALEZ, C.A., and CHANSON, H. (2007). "Diseno Hidráulico de Vertedores Escalonados con Pendientes Moderadas: Metodologia Basada en un Estudio Experimental." ('Hydraulic Design of Embankment Stepped Chutes: A Methodology based on an Experimental Study.') Ingenieria Hidraulica en Mexico (Hydraulic engineering in Mexico), Vol. 22, No. 2, II Epoca, April-June, pp. 5-19 & Front Cover (ISSN 0186-4076) (in Spanish).

Document type: Journal Article
Sub-type: Article (original research)
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Created: Wed, 23 May 2007, 15:17:34 EST by Hubert Chanson on behalf of Faculty Of Engineering, Architecture & Info Tech