Baffled Apron As Spillway Energy Dissipator

Rhone, Thomas J.

doi:10.1061/jyceaj.0004906

Cited by 11 publications

(3 citation statements)

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“…The strategy of kinetic-energy dissipation of fast running water on spillways is generally determined by the geometry of the hydraulic structure and the range of discharge, when one usually decided between utilization of either the hydraulic jump or a bucket at the toe of the spillway, [1,2]. In case of unlimited space for arranging the energy dissipation of the water flow, the design process becomes relatively easy or even entertaining.…”

Section: Introductionmentioning

confidence: 99%

Physical-Model-Based Assessment of Reduction of Hydraulic Forces Acting on Channel Bed through Advanced Energy Dissipator Design

ŠTEMBERK,

PETŘÍK,

EDLÁK

et al. 2024

mech

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The hydraulic engineering designers focus on shaping up the flow regime so that the greatest energy dissipation is ensured. On the other hand, the structural designers focus on load bearing capacity and durability of the structural components which may contradict the focus of the hydraulic experts. Such a case may occur when the spillway chute floor slab must be thin due to the limited spaces. Then, the dynamic load acting on the chute floor slab may compromise its long-term operation. The dynamic forces are created by the violent turbulences which may even coincide with the natural frequency of the reinforced concrete floor slab. Therefore, the objective of this paper is a complex approach to small-scale physical model testing which makes use of the latest rapid-prototyping techniques and the particle image velocimetry, and which in the end allows to estimate the magnitude of the dynamic hydraulic forces acting on the channel bed. The newly developed organic-shape energy dissipators play a key role in reducing the kinetic energy of water through its enhances aeration. The proposed method on a small scale can assist favorably the design process of real-scale hydraulic reinforced concrete structures.

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Section: Introductionmentioning

confidence: 99%

Physical-Model-Based Assessment of Reduction of Hydraulic Forces Acting on Channel Bed through Advanced Energy Dissipator Design

ŠTEMBERK,

PETŘÍK,

EDLÁK

et al. 2024

mech

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“…The general trend in the design of chutes of spillways was set in the 1960s and 1970s when it focused on baffled apron, or baffled chute, which featured the baffles or the concrete blocks as the energy dissipators (Peterka 1964;Rhone 1977;George 1979). Later in 1990s, especially with introduction and the subsequent wider use of the roller-compacted concrete construction technology, the stepped chute design became popular and thus investigated (Vischer and Hager 1995;Robinson et al 1998;Yildiz and Kas 1998;Chanson 2002;Kadavy 2010a, 2010b).…”

Section: Introductionmentioning

confidence: 99%

“…The pioneering concrete applications on energy dissipation on chutes, known as the baffled chute, especially the work of Peterka (1964) and Rhone (1977) provided guidelines, which are followed till today for small-scale applications commonly encountered, for example, in irrigation (see Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Exploration of Advanced Fabrication Techniques for Organic Shaped Energy Dissipators in Spillways

Petřík

Štemberk

Zukal

2023

ACT

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This paper focuses on the advanced design and production of concrete energy dissipators which are used for aeration of water on spillways. Traditionally, the concrete energy dissipators assumed simple block shapes which were dictated by limited production capabilities, mainly by the planar formwork and issues related to demolding. The advent of new concrete mix design and flexible construction technologies, such as 3D printing and CNC machines, allowed to consider more optimized organic shapes for increasing the energy dissipation efficiency and reducing the volume of material in our case by 38%. Since the physical laboratory modeling is an integral part of hydraulic research, a prototyping method using small-scale models was developed for design, production, quality control and experimental assessment of concrete energy dissipators of complex shapes. This method helps to expedite the research process when newly designed or modified shapes can be readily produced and tested in the hydraulic test channel for its energy dissipation efficiency and erosion resistance. The digital production, as all geometric information is perfectly digitized, at the same time helps to define the numerical models of the spillways for advanced continuum fluid dynamics analyses.

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Energy Dissipation Structures

James

2019

Hydraulic Structures

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Baffled Apron As Spillway Energy Dissipator

Cited by 11 publications

References 0 publications

Physical-Model-Based Assessment of Reduction of Hydraulic Forces Acting on Channel Bed through Advanced Energy Dissipator Design

Physical-Model-Based Assessment of Reduction of Hydraulic Forces Acting on Channel Bed through Advanced Energy Dissipator Design

Exploration of Advanced Fabrication Techniques for Organic Shaped Energy Dissipators in Spillways

Energy Dissipation Structures

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