Reference : Energy Dissipation of a Type III Basin under Design and Adverse Conditions for Steppe...
Scientific journals : Article
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/224417
Energy Dissipation of a Type III Basin under Design and Adverse Conditions for Stepped and Smooth Spillways
English
Valero Huerta, Daniel mailto [Université de Liège - ULiège > > > Form. doct. sc. ingé. & techn. (archi., gén. civ. - paysage)]
Bung, Daniel B. mailto [FH Aachen > Hydraulic Engineering Section > > >]
Crookston, Brian M. [Schnabel Engineering > > > >]
Jul-2018
Journal of Hydraulic Engineering
American Society of Civil Engineers
144
7
04018036
Yes (verified by ORBi)
International
0733-9429
NY
[en] United States Bureau of Reclamation (Reclamation) Type III stilling basin ; Stepped spillway ; Smooth spillway ; Computational fluid dynamics (CFD) ; Design and adverse conditions ; Energy dissipator
[en] New information regarding the influence of a stepped chute on the hydraulic performance of the United States Bureau of Reclamation (Reclamation) Type III hydraulic jump stilling basin is presented for design (steady) and adverse (decreasing tailwater) conditions. Using published experimental data and computational fluid dynamics (CFD) models, this paper presents a detailed comparison between smooth-chute and stepped-chute configurations for chute slopes of 0.8H:1V and 4H:1V and Froude numbers (F) ranging from 3.1 to 9.5 for a Type III basin designed for F = 8. For both stepped and smooth chutes, the relative role of each basin element was quantified, up to the most hydraulic extreme case of jump sweep-out. It was found that, relative to a smooth chute, the turbulence generated by a stepped chute causes a higher maximum velocity decay within the stilling basin, which represents an enhancement of the Type III basin’s performance but also a change in the relative role of the basin elements. Results provide insight into the ability of the CFD models [unsteady Reynolds-averaged Navier-Stokes (RANS) equations with renormalization group (RNG) k-ϵ turbulence model and volume-of-fluid (VOF) for free surface tracking] to predict the transient basin flow structure and velocity profiles. Type III basins can perform adequately with a stepped chute despite the effects steps have on the relative role of each basin element. It is concluded that the classic Type III basin design, based upon methodology by reclamation specific to smooth chutes, can be hydraulically improved for the case of stepped chutes for design and adverse flow conditions using the information presented herein.
Urban and Environmental Engineering
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/2268/224417
10.1061/(ASCE)HY.1943-7900.0001482
https://ascelibrary.org/doi/10.1061/(ASCE)HY.1943-7900.0001482

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