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以某航电枢纽施工导流工程为例,采用MIKE21软件对施工导流中的束窄河道泄流进行了数值模拟,分析了围堰体型对束窄河道水流流态的影响,对围堰体型进行了水力优化,并利用物理试验进行了验证。数值计算及物理模型试验结果表明,优化后的围堰头部有助于减弱回流及水流侧向收缩。
Taking the diversion project of a navigation project as an example, the numerical simulation of beam-narrowed river discharge in construction diversion is carried out by using MIKE21 software. The influence of the cofferdam shape on the flow pattern of narrow and narrow rivers is analyzed. Hydraulic optimization was carried out and verified by physical experiments. The numerical calculation and physical model test results show that the optimized cofferdam head helps to reduce backflow and lateral contraction of water flow.