Improved Tunnel Spillway Flip Buckets

Rhone, Thomas J.; Peterka, A. J.

doi:10.1061/jyceaj.0000393

Cited by 3 publications

(1 citation statement)

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“…The sky-jump spillway was built for the first time in France in 1930 on the Dordogne's hydraulic scheme [1]. Rhone and Peterka [2] studied and improved the design of this type of spillway, which today is commonly used in dams when the speed of the water, in the final stretch of the chute if adequately high [3]. With this type of hydraulic structure, it is possible both to dissipate the energy and direct the jet to a certain area of the riverbed [4].…”

Section: Introductionmentioning

confidence: 99%

Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways

Pellegrino

Toledo

Aragoncillo

2020

Water

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The sky-jump spillway is an economical and effective solution to return water to a river, eventually complemented by a pre-excavated basin. However, an inappropriate design could endanger spillways and even the dam itself. For the design of a sky-jump it is necessary to evaluate the position and dimensions of the potential pre-excavated basin based on the characteristics of the water flow to be evacuated and the geometric configuration of the sky-jump. The jump of the water jet occurs when a certain flow rate is reached. This flow rate for the initiation of the jet flow determines the position of the impact area closest to the spillway. We propose a new formula for the determination of the flow rate for the initiation of the jet flow, which incorporates as a novelty the influence of the curvature of the flip bucket. A methodology for the direct determination of the flow rate for the initiation of the jet flow is also presented. The new formula and methodology, based on experimental laboratory work and numerical modeling, will support the designer to choose the energy dissipation way, in the riverbed or inside the flip bucket, for low and frequent discharge flows.

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Section: Introductionmentioning

confidence: 99%