以三峡船闸进水口输水系统为研究背景，建立三峡船闸进水口的数值几何模型；同时根据进水口水流具有自由表面及较大弯曲壁面的流动特性，建立计算模型和网格边界。在此基础上，分别对三峡船闸进水口在145.0 m及175.0 m（正常蓄水位）两种库水位条件下输水运行进行了数值模拟，其计算结果与物理模型及原型观测数据对比，较为吻合，说明该数值模型对研究上游引航道通航水流条件及输水廊道的水力特性，具有较好的效果。

A numerical geometry model for the inlet of the Three Gorges Project lock was set up. According to the hydraulic characteristics of inlet flow possessing the free surface of inlet flow and the larger curved wall, the numerical model and the grid borders conditions were established. The motions of the inlet flow were calculated under the conditions of the water levels of 145.0 m and 175.0 m respectively. The numerical results are in good agreement with the data of physical model and prototype. Therefore, the numerical model was effective to study the hydraulic characteristics of the flow conditions in the upstream approach channel and water delivery gallerys.