Energy dissipation along stepped spillways

Valentin, G.; Volkart, Peter U.; Minor, Hans-Erwin

doi:10.1201/b16994-38

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…A larger reduction of the downstream stilling basin due to the reduction in specific residual energy is attained for stepped spillways than for smooth spillways, reaching up to six times that of conventional spillways (Sorensen 1985, Christodoulou 1993. Numerous studies concerned with stepped spillways were presented such as those by Peyras et al (1992), Chamani and Rajaratnam (1999a), Valentin et al (2004), and Chinnarasri and Wongwises (2006). Figure 1(a,b) shows the flow characteristics over stepped spillways, classified as nappe flow for small discharges (Fig.…”

Section: Introductionmentioning

confidence: 96%

Energy dissipation and flow characteristics of baffles and sills on stepped spillways

Zare

Doering

2012

Journal of Hydraulic Research

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In this study, a two-dimensional physical model was used to evaluate the effectiveness of adding baffles and sills at step edges or of shifting them from step edges of a 1V:1H sloping, short, sharp-or round-crested stepped spillway with an ogee inlet. A comparison between different configurations of baffles and sills was carried out with respect to the energy dissipation and the flow characteristics. The baffle-shifted round-crested spillway gives the smallest discharge required for the onset of a skimming flow among all other configurations. The baffle-edged chute dissipates more energy than the sill-edged spillway. Shifting baffles or sills from the sharp edges decreases the energy dissipation. Shifting baffles or sills from the round-crested spillway increases the energy dissipation in the range of the discharges studied. Empirical equations for energy dissipation are introduced for practical application of spillways of comparable similar conditions.

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Section: Introductionmentioning

confidence: 96%

Energy dissipation and flow characteristics of baffles and sills on stepped spillways

Zare

Doering

2012

Journal of Hydraulic Research

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“…Dynamic load for stilling basins has been the subject of research for smooth converging chutes [9] and in plunge pools with hydraulic jump [11,20]. Although there is some amount of experimental research on the stepped stilling basin flow in general [4,21,22], there are few published reports on the subject of dynamic loads in the stepped chute stilling basins [6], and, to the authors' knowledge, there is currently no published research in the area of dynamic loads in the basins of stepped chutes with variable bottom width (chutes with converging walls). In addition, there are no studies on the load on the stilling basin walls in the available literature.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Loads in a Stilling Basin of a Converging Stepped Spillway: An Experimental Study

Milovanovic,

Vojt,

Zindovic

et al. 2023

Water

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This paper presents a methodology for estimation of hydrodynamic loads acting on the bottom and at the walls of a stilling basin of a stepped chute with converging walls, based on the pressure measurements at the selected points of a scale model. This is the first study of hydrodynamic loads for this type of structure, and the first one of the loads on the stilling basin walls in general. For selected flow discharges, step heights and hydraulic jump submergence ratio, the hydrodynamic pressures were measured at a significant number of points, providing the spatio-temporal distribution of relevant hydrodynamic loads. The most influential effect proved to be a convergence angle of the chute walls. Based on these measurements, appropriate regression expressions were proposed for predicting hydrodynamic loads. These expressions show good agreement with measurements, offering a reliable tool for the structural design of stepped spillway stilling basins.

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Energy dissipation along stepped spillways

Cited by 2 publications

References 2 publications

Energy dissipation and flow characteristics of baffles and sills on stepped spillways

Energy dissipation and flow characteristics of baffles and sills on stepped spillways

Hydrodynamic Loads in a Stilling Basin of a Converging Stepped Spillway: An Experimental Study

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