Abstract
Abstract In this paper, the influence of shaft spillway shape on its performance is studied by numerical simulation to improve its design and operation efficiency. The type of pressure slope section, the sensitivity of the radius of the turning section, and the optimal arrangement of the stilling pool are studied and analyzed. It is found that increasing the length of the pressure slope section can stabilize the flow in the pressure section of the tunnel. The deflection phenomenon can be reduced by increasing the radius of the turning section. The symmetrical arrangement of the stilling pool can improve the water flow pattern. Through numerical simulation, the paper provides some suggestions on the optimal design of the shaft spillway to improve its performance and efficiency.
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