Author(s): Yuzhuang Chen; Xinlei Guo; Tao Wang; Hui Fu; Yongxin Guo; Jiazhen Li; Jiajia Pan
Linked Author(s): Xinlei Guo, Yuzhuang Chen, Tao Wang
Keywords: Vortex vortex dissipating bars model testing spillway hydraulic performance optimization
Abstract: In the expansion project of a certain reservoir, a new gated spillway with a combined breast wall and an unconventional low weir is proposed. The new design type, combined with complex curved inflow conditions, results in highly complicated flow patterns at the inlet and outlet of the spillway sluice chamber. Hydraulic model tests revealed that the original design caused a continuous suction vortex before the spillway and a diamond-shaped disturbance wave in the sluice section after the spillway, with insufficient discharge capacity during flow through the orifice. To address these issues, this study proposes optimization measures for the breast wall shape and the arrangement of vertical vortex dissipating bars in front of the breast wall. Without significantly altering the original design, the optimized plan eliminated suction vortices under the 500-year flood water level and below, significantly reducing the intensity of the diamond-shaped disturbance wave and improving the discharge capacity during orifice flow by more than 14%. The research results can provide a reference for similar spillway design and hydraulic performance optimization.
Year: 2025