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该文采用雷诺平均的N-S方程和k-?紊流模型,建立了三维水流数学模型,对某天然河道取水口前沿设置导沙底墙的水流效应进行了模拟,计算结果与试验实测结果吻合较好。进一步对导沙底墙附近的水流运动规律进行分析,结果表明:在取水口前沿布置导沙底墙,改变了底墙间底层水流的流向,使底墙顶部附近产生了较强的螺旋流,可以实现导底沙、取清水的工程效果。说明所建立的数学模型可以较好地描述导沙底墙形成的螺旋流及其分布特征,可为此类工程的方案分析提供参考。
Based on Reynolds averaged Navier-Stokes equations and k-? Turbulence model, a three-dimensional water flow mathematical model is established to simulate the water flow effect of the bottom wall of a natural river water intake. The calculated results are in good agreement with the experimental results it is good. Further analysis of the movement of the water near the bottom of the guide sand shows that the bottom wall of the bottom wall of the water diversion channel changes the flow direction of the bottom water so that a strong spiral flow is generated near the top of the bottom wall, Can be achieved at the end of the sand, take water project results. It shows that the mathematical model established can well describe the spiral flow and its distribution characteristics of the bottom of the sand guide, which can provide a reference for the scheme analysis of this kind of project.