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
2017-12-05
End date
2017-12-06
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