以某低水头水利枢纽电站工程布置为实例，首先采用物理模型的方法，观测分析了导墙布置对电站进水口流态的影响，并针对导墙附近形成的局部漩涡予以理论分析，提出导墙附近漩涡的形成规律；然后利用标准k-ε紊流模型对各工况进行了数值模拟，在此基础上，进一步从三维流态、断面流速分布及紊动能等方面，分析了影响电站进水口流态的因素，即在水力要素一定的情况下，导墙长度对进水口断面流速分布存在一个临界长度，为今后其他工程电站导墙布置提供了参考，有一定的借鉴意义。

With a low head hydropower station as case study, we observed and analyzed the influence of guide-wall design on the flow pattern at the intake of the station through physical model. Having theoretically analyzed the local vortex near the guide-wall, we presented the law of the formation of vortex near the guide-wall. Furthermore, based on numerical simulation of different working conditions through standard k-ε turbulence model, we analyzed the 3-D flow pattern, the section flow velocity distribution, and the turbulent kinetic energy to obtain factors affecting the flow pattern at the intake. We found that the length of guide-wall determined the lateral force on the vortex. Under certain hydraulic elements, when a critical value of guide-wall length exists, the head loss caused by vortex could be small while the discharge capacity could be optimum. This research could be referential for the design of guide-wall of power stations.