针对侧槽式溢洪道侧槽段水流大尺度的横向旋涡、回卷表层水流与由溢流堰下泄水流相互作用后掺气、沿主流方向平均流速分布不规则的问题,采用RNGκ-ε紊流模型对侧槽式溢洪道水力特性进行了三维数值模拟,并与物理模型试验结果进行了对比,获得了水流流态、水面线、压强和流速等水力参数的分布特征。结果表明,计算值与实测值相吻合,该方法有效可行。 In view of the large-scale lateral vortex flow in the side channel section of the side channel spillway, the problem of the irregular distribution of the average velocity in the main stream due to the interaction between the rewatered surface water flow and the discharge flow under the weir, the RNG κ-ε turbulence model The three-dimensional numerical simulation of the hydraulic characteristics of the side channel spillway is carried out. Compared with the results of the physical model test, the distribution characteristics of hydraulic parameters such as water flow pattern, water line, pressure and velocity are obtained. The results show that the calculated value is consistent with the measured value, and the method is effective and feasible.