Correspondence. Model-Experiments on Bellmouth and Siphon-Bellmouth Overflow Spillways.

Binnie, G M; Binnie, W J E

doi:10.1680/ijoti.1939.14501

Cited by 1 publication

(1 citation statement)

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“…Additionally, the inlet mouth can absorb the accumulated sediment closer to the reservoir base. In siphon-shaft spillway, it is recommended to make it vertical, as large vacuums may occur if the shaft is inclined (Binie, 1938). Besides its advantages, there are some disadvantages such as limited capacity, so it is recommended to plan it with an auxiliary spillway to be used when necessary (Agiralioglu, 1977).…”

Section: Introductionmentioning

confidence: 99%

Aeration performance of high-head siphon-shaft spillways by CFD models

Aydın

Ulu

2021

Appl Water Sci

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Siphon-shaft spillways are constituted by covering above a shaft spillway with a hood that creates siphonic pressure. This study focused on the aeration the flow through the aerator holes placed on the hood to prevent cavitational damage in high-head siphon-shaft spillways. Three-dimensional computational fluid dynamics (CFD) technique using finite-volume method to solve Reynolds-averaged Navier–Stokes (RANS) equations for the incompressible viscous and turbulent fluids motion was performed to analyze the full-scaled two-phase numerical models. The volume of fluid (VOF) scheme was used to simulate two-phase (water–air) flow, by defining the volume fraction for each of the fluids throughout the solution domain. The accuracy of the numerical model was tested using a procedure recommended by American Society of Mechanical Engineers (ASME) for CFD applications. The numerical results showed that the aeration is highly effective in reducing siphon sub-pressures and cavitation. The optimal relative aeration diameter of 0.45 provided sufficient air entrainment to protect from cavitation and did not decrease the discharge performance too much.

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Section: Introductionmentioning

confidence: 99%