Abstract
V-shaped stepped spillway is a new shaped stepped spillway, and the pressure distribution is quite different from that of the traditional stepped spillway. In this paper, five turbulence models were used to simulate the pressure distribution in the skimming flow regimes. Through comparing with the physical value, the realizablek-εmodel had better precision in simulating the pressure distribution. Then, the flow pattern of V-shaped and traditional stepped spillways was given to illustrate the unique pressure distribution using realizablek-εturbulence model.
Highlights
The unique structure of the stepped spillways causes abundant vortices near the steps [1,2,3], which results in high energy dissipation and aeration than that of smooth spillways [4, 5]
Pressure distribution in stepped spillways became a research focus for negative pressure on the step surface which may lead to cavitation damage
Since the pressure distribution changed along the cross section in V-shaped stepped spillway, three rows of pressure measurement points were adopted, and the position of rows was in Z/B = 0, Z/B = 0.25, and near the Z/B = 0.5, respectively
Summary
The unique structure of the stepped spillways causes abundant vortices near the steps [1,2,3], which results in high energy dissipation and aeration than that of smooth spillways [4, 5]. The pressure distribution along the Vshaped stepped spillway in the skimming flow regime was studied through numerical simulations with five kinds of turbulence models and the unique pressure distribution was Mathematical Problems in Engineering analyzed through the comparison of the flow pattern between traditional and V-shaped stepped spillways. These results can be used to choose a better turbulence model to study the pressure distribution of V-shaped stepped spillway
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