Enhanced energy dissipation in stepped chutes
نویسندگان
چکیده
منابع مشابه
Energy 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 کاملnew approach for estimating of energy dissipation over stepped spillways
hydraulics of stepped spillway is a very complicated phenomenon, as it consists of a two phase flow passing through a set of designed steps. the steps increase the rate of energy dissipation taking place on the spillway face. turbulence, flow aeration and energy dissipation are the main tasks in the design of such structures. this study consists of the experimental investigation to determine th...
متن کاملSelf-similarity and energy dissipation in stepped polymer films.
The surface of a thin liquid film with a nonconstant curvature is unstable, as the Laplace pressure drives a flow mediated by viscosity. We present the results of experiments on one of the simplest variable curvature surfaces: a thin polymer film with a step. Height profiles are measured as a function of time for a variety of molecular weights. The evolution of the profiles is shown to be self-...
متن کاملHydraulics of stepped chutes: The transition flow L’hydraulique des chutes en marches d’escalier: L’écoulement de transition
Stepped spillway flows may behave as a succession of free-falling nappes at low flows and as a skimming flow at large discharges. However there is a range of intermediate flow rates characterised by a chaotic flow motion associated with intense splashing: i.e. the transition flow regime. Detailed air–water flow properties in transition flows were measured in two large experimental facilities. T...
متن کاملAir Entrainment and Energy Dissipation on Gabion Stepped Weirs
In the last three decades the design of stepped spillways regained some interest because of their suitability with new construction methods including gabion placement. In this study, the hydraulic performances of gabion stepped weirs were investigated experimentally in terms of the air-water flow properties and energy dissipation rate. A physical study was performed in a relatively large size f...
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ژورنال
عنوان ژورنال: Water Management
سال: 2001
ISSN: 1741-7589
DOI: 10.1680/wama.148.4.277.40581