Performance of Hydrodynamics Flow on Flip Buckets Spillway for Flood Control in Large Dam Reservoirs

Omid Aminoroayaie Yamini,Azin Movahedi,Mohammad Reza Kavianpour

doi:10.28991/hef-2020-01-01-05

Omid Aminoroayaie Yamini, Azin Movahedi + Show 1 more

Open Access

https://doi.org/10.28991/hef-2020-01-01-05

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Abstract

Flip buckets are usually used in high head dams to dissipate the destructive energy of high speed jets. These structures are fixes at the end of the outlet conduits to direct the moving jet into the atmosphere. The process of energy dissipation also resumes, while the jet entering into its downstream plunge pool. Although studies of flow over flip buckets turn back to many years ago, but still there are uncertainties regarding the flow behaviour over these structures with various geometries and flow conditions. In this study, experimental measurements of static and dynamic pressures and their distribution over these structures are investigated. Measurements were made along two different simple flip buckets with various Froude numbers to determine the effects of the geometry and flow characteristics on pressure field. Maximum pressures are also presented and the results are compared with those of other investigations. The results of this study can be used to increase the safety of large dams that remain sustainable in the process of exploitation such as irrigation, human consumption, industrial use, aquaculture, and navigability. Doi: 10.28991/HEF-2020-01-01-05 Full Text: PDF

Highlights

A large dam is a barrier that prevents or limits the flow of surface water or underground streams
As the static pressure is a function of flow depth, it is possible to measure and calculate both static and dynamic pressures on the bed and the side walls
The results show that upstream from the bucket, the pressure distribution starts increasing from hydrostatic values to a maximum hPM and reducing to at the end of the bucket

Summary

Introduction

A large dam is a barrier that prevents or limits the flow of surface water or underground streams. A chute spillway is a common and basic design that transfers excess water from behind the large dam down a smooth decline into the river downstream. These are usually designed following an ogee curve spillway. Most often, they are lined on the bottom and sides with concrete to protect the dam and topography. They are lined on the bottom and sides with concrete to protect the dam and topography They may have a controlling device and some are thinner and multiply-lined if space and funding are tight.

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