Simple Design Criterion for Residual Energy on Embankment Dam Stepped Spillways
نویسندگان
چکیده
منابع مشابه
Simple Design Criterion for Residual Energy on Embankment Dam Stepped Spillways
The stepped spillway design is associated with significant flow resistance and associated energy dissipation on the steps, yielding smaller, more economical downstream dissipation structures. A number of design guidelines were developed for steep stepped spillways typical of concrete gravity dams. The focus of this study is on embankment stepped spillways. A large set of air-water flow data is ...
متن کاملEnergy Dissipation and Residual Energy on Embankment Dam Stepped Spillways
Stepped spillways are designed to increase the rate of energy dissipation on the chute and to reduce the size of the downstream energy dissipator. It is essential to predict accurately the turbulent dissipation above the steps for large discharges per unit width corresponding to the skimming flow regime. New measurements were conducted in a large facility with a channel slope of 21.8o and a ste...
متن کاملEmbankment dam spillways and energy dissipators
For the last fifty years, the design floods of a number of embankment dams were re-evaluated and the revised spillway outflows are often larger than the original design discharges. Several embankment overtopping protection systems were developed for earthfill structures, and the applications range from river dykes to tsunami protections including embankment dams. Well-known designs include timb...
متن کاملAeration, Flow Instabilities, and Residual Energy on Pooled Stepped Spillways of Embankment Dams
Air-water flow experiments were conducted on some flat and pooled stepped spillways with slopes of 8.9° and 26.6° in transition and skimming flows. The study comprised the observations of the flow patterns, characteristic air-water flow properties, and energy dissipation performances. The air-water flow properties showed some differences in terms of interfacial velocity, bubble count rate, and ...
متن کاملStepped spillways for embankment dams. Review, progress and development in overflow hydraulics
In recent years a number of embankments were designedwith concrete overtopping protection shaped in a stepped fashion. During large overflows on stepped chutes, there is no skin friction between mainstream and steps, and flow resistance is basically form drag. Alterations of flow recirculation and of fluid exchanges between free-stream and cavity flow are discussed in this study. A comprehensiv...
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ژورنال
عنوان ژورنال: Journal of Hydraulic Engineering
سال: 2016
ISSN: 0733-9429,1943-7900
DOI: 10.1061/(asce)hy.1943-7900.0001107