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Geometry effects on energy dissipation over stepped spillway

conference contribution
posted on 01.01.2017, 00:00 authored by Udai Jahad, Riyadh Al-AmeriRiyadh Al-Ameri, Lloyd ChuaLloyd Chua, Subrat DasSubrat Das
The stepped spillway is a hydraulic structure, mostly used in dams. Normally, stepped spillways were designed to increase the energy dissipation level and hence decrease the risks at downstream. The current experimental investigation includes two groups of scale models, each with four different variables, to investigate the impact of step shape on flow characteristics and energy dissipation. The two groups were defined based on the downstream slope of the spillway (group one angle =26.6°, and group two angle = 21.8°). The test results with dimensional analyses confirms the significant influence of the geometrical parameters, namely, the height of step h, the radius of the end sill, and the number of steps N, on the energy loss process. Furthermore, at small values of discharge (at Nappe flow regime) the energy dissipation is the largest. Any increase in discharge will affect the flow regime and the energy dissipation, while any increase in the step number (N) will increase the energy dissipation.

History

Event

Iraqi Ministry of Higher Education and Scientific Research. Conference (1st : 2017 : Melbourne, Vic.)

Series

Iraqi Ministry of Higher Education and Scientific Research Conference

Pagination

96 - 102

Publisher

Swinburne University of Technology

Location

Melbourne, Vic.

Place of publication

Melbourne, Vic.

Start date

05/12/2017

End date

06/12/2017

ISBN-13

9781925761016

Language

eng

Publication classification

E Conference publication; E1 Full written paper - refereed

Copyright notice

2017, Swinburne University of Technology

Editor/Contributor(s)

R Al-Mahaidi, A Al-Mosawe, M Al-Younis

Title of proceedings

ISCA 2017 : Proceedings of The First MoHESR and HCED Iraqi Scholars Conference in Australasia 2017

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