下水式升船机船厢入水过程三维数值模拟技术

3D numerical simulation technology on the water-entry process of navigation chamber for chamber-launching ship lift

船厢出入水过程产生的附加水动力荷载是下水式升船机发展需要解决的一个突出问题。采用VOF模型和κ-ε湍流模型,结合动网格技术建立三维数学模型,对下水式升船机船厢入水过程的水动力学特性进行模拟。研究表明:该模型具有较好的精确性和稳定性,可以用于模拟船厢入水后船池内部产生的复杂水流运动。应用该模型分析构皮滩第三级垂直升船机船厢不同入水速度下船池内部水流波动特性以及流场分布特征,计算结果与物理模型试验结果吻合较好。

The additional hydrodynamic load produced in the process of navigation chamber going into ＆ out of navigation pool is the main problem on development of chamber-launching ship lift. The VOF model, the κ-ε turbulence model, and the dynamic mesh method are used to build a 3D mathematical model for simulating the hydrodynamic characteristics of the water-entry process of navigation chamber. The result shows that the 3D mathematical model built in this paper is more accuracy and stability, which can simulate the complex flow patterns in navigation pool produced by the navigation chamber entering into water. By the 3D mathematical model, we analyze the fluctuation and flow distribution characteristics have been analyzed when the navigation chamber enter into water with different velocities to the third stage vertical ship lift of Goupitan hydropower station.The calculation results are in accordance with the experiment results.