溢流坝进水口导墙体型优化试验与数值模拟研究

Experimental and Numerical Simulation of Inlet Guide-wall Shape Optimization of Overflow Dam

为了探究不同布置形式的溢流坝进水口导墙对工程运行的影响,以直线型和直线圆弧组合型两种布置形式的导墙为例,通过整体物理模型试验和数值模拟的方法分析了闸孔进口及土石坝附近的流态、流速、紊动能等水力学特性。结果表明,直线型导墙会使其附近水流流态紊乱,降低临近闸孔的泄流能力,还会冲刷土石坝坡脚;直线圆弧组合型导墙可有效改善直线导墙形成的不利流态,为闸孔稳定泄流提供保障。研究结果可为其他类似工程导墙布置提供参考。

In order to explore the influence on engineering operating,which is affected by different layout of inlet guide-wall overflow dam,the linear and linear-arc combination guide-wall were taken as research object.The hydraulic characteristics of flow pattern,velocity,turbulence kinetic energy near the inlet of surface holes were analyzed by the method of overall model test and numerical simulation.The results show that the linear guide-wall could cause disorder flow and reduce the discharge capacity of the surface holes near around.Besides,it could cause erosion damage to the sloop foot of the earth-rock dam.However,the linear-arc combination guide-wall could effectively improve the disorder flow appeared in the scheme of linear guide-wall,and provide protection for the stable discharge of the surface holes.The research results can provide reference for the layout of guide-wall in other similar project.