在1∶100水工模型试验的基础上，应用k-ε流数值模型，采用VOF方法，对低水头大流量河床式电站大坝泄洪流场进行了三维数值模拟。将计算得出的各工况下泄洪闸闸室及下游流场的流态，水面线，闸室内流速、压力分布等水力特性值与试验数据对比，发现计算值与试验值基本吻合。说明所选择的紊流数学模型，建立基本控制方程以及求解数学模型的离散方法是比较可靠的，可以为工程设计提供参考。

On the basis of model test, a 3 D numerical simulation on the flow field of low waterhead and big discharge riverbed hydroelectric station was made by adopting k-ε turbulence model and VOF method. The calculated flow pattern, water surface line,flow velocities ,and the pressure distributions were compared with test results. The results show that the calculated results are in good agreement with the experimental data. It is proved that the turbulent mathematical model , the basic control equation and discrete method are reliable. The results can be used for the engineering design.