Results 121 to 130 of about 657 (163)
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Pressures on a stepped spillway
Journal of Hydraulic Research/De Recherches Hydrauliques, 2007This paper presents an analysis of the pressure field on the steps of a stepped spillway on an RCC dam. The fundamental component of this study is a series of pressure measurements obtained in the fully-developed zone of skimming flow regime along a reduced-size stepped spillway model constructed at the Department of Hydraulic, Maritime and ...
Ernest Blade, Josep Dolz
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Dissipation efficiency of stepped spillways
2020This study on hydraulic structures used for dissipating energy downstream from dams offers interesting suggestions for applied research aiming to improve hydraulic efficiency and constrain construction costs without neglecting environmental aspects. Extensive experimental tests have been carried out in the laboratory of Dipartimento di Ingegneria delle
Fratino, U, Piccinni, AF, de Marinis, G
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Water (Switzerland), 2018 Pooled stepped spillway is known for high aeration efficiency and energy dissipation, but the understanding for the effects of pool weir configuration on the flow properties and energy loss is relatively limited, so RNG k − &epsilon ...
Jianmin Zhang, Li Shicheng
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Analysis of pressures on a stepped spillway
Journal of Hydraulic Research/De Recherches Hydrauliques, 2008The pressure profiles on the horizontal and vertical step faces of a stepped spillway in the fully developed skimming flow region were measured. These observations allow to provide generalized equations that enable designers to analyze the amount and the location of negative pressures along the steps.
Marti Sànchez-Juny +2 more
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Hydraulics of stepped spillways with different numbers of steps
Dams and Reservoirs, 2010This paper describes the study of two physical models that were built to investigate the energy dissipation and flow regimes for different discharges over stepped spillways with different numbers of steps. These physical models had a general slope of 19·2% and had 12 and 23 steps respectively.
R. Roshan +5 more
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Journal of Hydraulic Engineering, 1994
This technical note presents a method to estimate the energy loss on stepped spillways for the jet‐flow regime, which occurs when the ratio of the critical depth yc to the height of the step h is less than approximately 0.8. It introduces the concept of α, the proportional energy loss per step, and using the extensive experimental results of Horner, α;
M. R. Chamani, N. Rajaratnam
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This technical note presents a method to estimate the energy loss on stepped spillways for the jet‐flow regime, which occurs when the ratio of the critical depth yc to the height of the step h is less than approximately 0.8. It introduces the concept of α, the proportional energy loss per step, and using the extensive experimental results of Horner, α;
M. R. Chamani, N. Rajaratnam
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Hydraulics of Stepped Spillways
2020This book provides a discussion of the latest research pertaining to the hydraulic design of spilways and to hydraulic engineering in general. It comprises the papers of a workshop organized to bring together engineers and scientists from around the world for the exchange of ideas on water flow over stepped spillways.
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Air–Water Flows and Head Losses on Stepped Spillways with Inclined Steps
Journal of Irrigation and Drainage Engineering, 2022On a stepped spillway, the staircase invert profile generates some intense turbulent dissipation during the spill, associated with a significant reduction of kinetic energy, as well as strong self-aeration. The present study focused on the effects of inclined downward steps on the air–water flow properties, flow resistance, and head losses because ...
Yvan Arosquipa Nina +3 more
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Design of converging stepped spillways
2008Roller compacted concrete (RCC) stepped spillways are growing in popularity for providing overtopping protection for aging watershed dams with inadequate auxiliary spillway capacity and for the construction of new dams. Unobtainable land rights, topographic features, and land use changes caused by urbanization limit the ability to construct new dams or
Hunt, Sherry Lynn, Abt, Steven
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Bottom Aeration of Stepped Spillways
Journal of Hydraulic Engineering, 2006The upstream reach of stepped spillway flows may become prone to cavitation damage for large specific discharges because of the absence of air close to its bottom, until the point of bottom self-aeration is reached. This study considers the effect of two aerator types located at the first vertical step face to add air to the chute bottom.
Pfister, Michael +2 more
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