Results 21 to 30 of about 1,172 (264)
Influence of Aeration Threshold on Performance of Stepped Spillway
Guan'gai paishui xuebao, 2023 【Background and Objective】 Flood control is a primary task in water conservancy hubs, especially hydropower stations. Many hydropower projects in western China are characterized by high water head, large discharge, and narrow river valleys.
LI Xiaochao +5 more
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CFD Modelling of a Stepped Spillway with Various Step Layouts [PDF]
Mathematical Problems in Engineering, 2019 A traditional stepped spillway is prone to cavitation risks. To improve its hydraulic behaviors, distorted step faces and pool weirs are devised. By numerical modelling, comparative studies are conducted to look into the flow features. The pressures on step surfaces of the unconventional layouts exhibit 3D distributions.
Shicheng Li, Qiulin Li, James Yang
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Aeration characteristics for skimming flow along the pre-aerator stepped spillways
Shui kexue jinzhan, 2014 Pre-aerator stepped spillways,where the aerator is placed prior to the primary step in the stepped spillway,can form a cavity chamber at the bottom to produce enough aeration concentration to avoid the cavitation erosion.
LIU Shanjun +5 more
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Applied Sciences, 2022 In this study, curved risers stepped spillways models based on the increasing angle of suspension were tested to check for improvement in energy dissipation and pressure distributions.
Najam us Saqib +6 more
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RBRH, 2021 The operation of stepped spillways is limited by a range of discharges due to the risk of occurrence of the cavitation phenomenon and erosion on its steps.
Priscila dos Santos Priebe +6 more
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The inception point of flow aeration on a rough stepped spillway [PDF]
هیدرولیک, 2023 Stepped spillways are used in hydraulic engineering projects such as small and large dams. The inception point of aeration on such hydraulic structures is essential in determining the zones of single and two-phase flow.
عباس پارسائی +2 more
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Effect Of Pooled and Flat Stepped Spillway on Energy Dissipation Using Computational Fluid Dynamics
Tikrit Journal of Engineering Sciences, 2022 The goal of this research was to determine the impact of a pooled and flat stepped spillway on energy losses. FLOW3D, which is a computational fluid dynamics (CFD) program, with mesh size of 0.015 mm was used for this purpose. First, the code was tested
Shawnm Mudhafar Saleh +2 more
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Prediction of air concentration in stepped spillways using data-oriented methods [PDF]
محیط زیست و مهندسی آبThe high flow velocity and the pressure reduction in the spillways cause damage to the spillways. In the present research, the application of Gaussian Process Regression (GPR) and Support Vector Machine (SVM) was investigated for predicting air ...
Kiyoumars Roushangar +3 more
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Stepped spillway with pre-aeration by a deflector: flow characteristics
RBRH, 2020 Stepped spillways aim to dissipate part of the upstream energy during the flow passage by the chute. However, the use of these structures is limited to a restrict range of specific discharges due to the risk of cavitation damage.
Carolina Kuhn Novakoski +5 more
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Stepped spillway flows and air entrainment [PDF]
Canadian Journal of Civil Engineering, 1993 Stepped spillways have become a popular method for handling flood releases. The steps significantly increase the rate of energy dissipation taking place on the spillway face and reduce the size of the required downstream energy dissipation basin. The compatibility of stepped spillways with roller compacted concrete and gabion construction techniques ...
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