Discussion of “Skimming, Nonaerated Flow on Stepped Spillways over Roller Compacted Concrete Dams” by Inês Meireles, Floriana Renna, Jorge Matos, and Fabián Bombardelli
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چکیده
منابع مشابه
Air Entrainment and Pressure Development in Skimming Flow on an Abrupt Slope Change on Stepped Spillways
Numerous stepped spillways were built to date, namely on RCC gravity dams or on valley flanks besides embankment or rockfill dams, while some others are currently under design or construction. In some cases, slope changes may be required on stepped chutes, due to the topography, leading to reduced excavation and related economic benefits. A quite limited number of stepped spillways have been bu...
متن کاملExperimental Study of Turbulence Manipulation in Stepped Spillways. Implications on Flow Resistance in Skimming Flows
Current expertise in air-water turbulent flows on stepped chutes is limited to laboratory experiments at low to moderate Reynolds numbers on flat horizontal steps. In this study, highly turbulent air-water flows skimming down a large-size stepped chute were systematically investigated with a 22o slope. Turbulence manipulation was conducted using vanes or longitudinal ribs to enhance interaction...
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 کاملcomparison of mixture and vof methods for numerical simulation of air-entrainment in skimming flow over stepped spillways
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متن کاملDetermination of Aerated Steps Number over Broad-Crest Stepped Spillways under Jet Flow Regime by using Artificial Neural Network
Recently, particular attention has been paid to the stepped spillways due to the increasing effect of energy dissipation and the reduction of cavitations risks with the development of Roller Compacted Concrete (RCC) technique. Flow regimes on the spillways divide into three groups, namely skimming, jet and transition flow. Compared to the numerical methods, the majority of performed studies in ...
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ژورنال
عنوان ژورنال: Journal of Hydraulic Engineering
سال: 2014
ISSN: 0733-9429,1943-7900
DOI: 10.1061/(asce)hy.1943-7900.0000753