香水河挡潮闸整治优化方案选择及其水力特性分析

Hydraulic Characteristics of Xiangshui River Tidal Gate and Research of Optimization Regulation Programs

为模拟分析香水河挡潮闸不同方案下的水力特性,在正交贴体曲线坐标下建立平面二维水动力数学模型,并用原方案的物理模型试验资料验证了所建模型的准确性,分析挡潮闸上下游流速分布的均匀性及关于闸轴线的对称性,由于数值模拟结果显示直接整治天然河道地形的原方案整治效果较差,进而提出优化方案,并将原方案与优化方案数值模拟结果进行对比分析。结果表明,优化方案对闸上下游流速分布改善较为明显,有利于挡潮闸的调度运行。

A two-dimensional hydrodynamic mathematical model is established under the orthogonal fitted curvilinear coordinate for numerical simulation of the hydraulic characteristics in different programs of the tidal gate of the Xiangshui River.The test data of physical model of the original program was used to verify the accuracy of the mathematical model.And then the velocity distribution＇s uniformity of the upstream and downstream of tidal gate and the gate＇s axial symmetry were analyzed.The results show that the hydraulic characteristics of the original program are poor.Therefore,optimization programs were presented and contrastive analysis of numerical simulation by two programs was implemented.It demonstrates that the optimized program makes the velocity distribution of upstream and downstream of the gate improve obviously and it is beneficial to scheduling of the tidal gate.