枢纽船闸引航道口门区三维水流数值模拟应用研究*

基于平面曲线坐标系、垂向σ坐标系建立了三维水流数学模型。采用控制体积法离散基本方程、交错网格以避免压力的振荡、动水压力校正法进行数值求解。分别采用经典急弯河段水槽试验资料、土谷塘物理模型试验资料对模型进行了验证。验证结果表明,模型能较好地反映弯曲河段三维水流结构特征和船闸引航道口门区的通航水流条件,可为枢纽船闸工程的平面布置方案论证提供技术支撑。

Application research on 3D flow numerical model in entrance area of ship lock approach channel

Based on the generalized curvilinear coordinates system in plane and sigma coordinate system in vertical direction, a 3D flow numerical model is established. It adopts the control-volume formulation to disperse the basic equations. To avoid pressure oscillations, staggered grids are used. It uses the hydrodynamic pressure correction method to solve the equations. Then the model is validated respectively by the field data in classical sharp curve reach and in the Tugutang physical model. The results show that the proposed model can reasonably simulate 3D flow characteristics in the sharp curve reach, and flow condition in the entrance area of ship lock approach channel. It can be used to study and optimize the general layout scheme of hydro-junction.