大坝溢洪道导流墙流态的数值模拟研究

Numerical Simulation of Flow Pattern of Diversion Wall in Spillway of Dam

通过物理建模和数值模拟进行流型识别,设计者可以获得水力结构的最佳形状。对水工建筑物进行优化有利于提高水工建筑物的工作性能。本文采用数值模拟和物理模拟相结合的方法,模拟了导墙的几何形状对新疆某水利枢纽大坝溢洪道流态和流量曲线的影响:利用Flow 3D软件作为计算流体力学(CFD)的工具,对导流壁的流态进行了数值模拟,分别对导向墙的3个方案进行了评估。结果表明:模型(3)对横波的消除效果最好,能使水流顺利通过引航道和溢洪道。

Designers can obtain the optimal shape of hydraulic structures by identifying flow patterns through physical modeling and numerical simulation.The optimization of hydraulic structures is beneficial to improve the working performance of hydraulic structures.In this paper,the influence of guide wall geometry on spillway flow pattern and flow curve of a hydraulic project dam in Xinjiang is simulated by combining numerical simulation and physical simulation.The flow 3D software is used as the computational fluid dynamics(CFD)tool to simulate the flow pattern of the diversion wall,and three schemes of the guide wall are evaluated respectively.The results show that model(3)has the best effect on shear wave elimination,allowing water to pass through the approach channel and spillway smoothly.