Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways
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 dim...
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2020-06-01
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doaj-845a339bc40d465187eaa1fd5337eccb2020-11-25T01:25:46ZengMDPI AGWater2073-44412020-06-01121814181410.3390/w12061814Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump SpillwaysRaffaella Pellegrino0Miguel Ángel Toledo1Víctor Aragoncillo2Departamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, Universidad Politécnica de Madrid, 28040 Madrid, SpainDepartamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, Universidad Politécnica de Madrid, 28040 Madrid, SpainIngeniero de Caminos, Canales y PuertosThe 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.https://www.mdpi.com/2073-4441/12/6/1814hydraulic structuresky-jumpspillwayflip bucketchutebasin |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Raffaella Pellegrino Miguel Ángel Toledo Víctor Aragoncillo |
spellingShingle |
Raffaella Pellegrino Miguel Ángel Toledo Víctor Aragoncillo Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways Water hydraulic structure sky-jump spillway flip bucket chute basin |
author_facet |
Raffaella Pellegrino Miguel Ángel Toledo Víctor Aragoncillo |
author_sort |
Raffaella Pellegrino |
title |
Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways |
title_short |
Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways |
title_full |
Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways |
title_fullStr |
Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways |
title_full_unstemmed |
Discharge Flow Rate for the Initiation of Jet Flow in Sky-Jump Spillways |
title_sort |
discharge flow rate for the initiation of jet flow in sky-jump spillways |
publisher |
MDPI AG |
series |
Water |
issn |
2073-4441 |
publishDate |
2020-06-01 |
description |
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. |
topic |
hydraulic structure sky-jump spillway flip bucket chute basin |
url |
https://www.mdpi.com/2073-4441/12/6/1814 |
work_keys_str_mv |
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