齿型构件混合堤正交丁坝水流力数值模拟

The numerically simulation on drag force of the orthogonal spur dike with toothed mixture embankment

为研究长江南京以下12.5 m深水航道整治工程齿型构件混合堤正交丁坝水流力特性,采用RNG k-ε湍流模型,建立了三维水动力数学模型。通过实测流速、水位以及构件水流力数据进行模型验证,验证结果良好。利用该数学模型对齿型构件混合堤正交丁坝水流力随流速、水深与坝长的变化规律展开研究,对齿型构件混合堤正交丁坝水流力轴线分布规律进行探讨。

Using the RNG k-ε turbulence model, this paper established three-dimensional hydrodynamic mathematical model to study on the characteristics of drag force of the orthogonal spur dike with toothed mixture embankment of the 12.5 m deep-water channel regulation phase II project in the Yangtze River under Nanjing.The mathematical model is validated well by the measured data of flow velocity, water level and drag force of tooth structure.The drag force characteristics of the orthogonal spur dike with toothed mixture embankment which varies with the change of flow velocity, water depth and dike length are studied using this model.Moreover, the axis distribution of drag force of the orthogonal spur dike with toothed mixture embankment is discussed.