为了改善泵站前池边侧大面积回漩不良流态, 基于商用 CFD 软件 Fluent, 运用 N-S 方程和 Reliable k-ε紊流模型对加倒 T 形底坎的前池进行数值模拟, 分析倒 T 形底坎的几何参数对前池流态和边侧流速的影响。结果表明: 无整流措施时, 前池中流态紊乱, 通过加设倒 T 形底坎可显著改善前池中的流态, 提高边侧机组的流速, 改善前池中流速分布均匀度; 倒 T 形底坎设置在前池中的位置和其上部结构的尺寸对前池整流效果有明显的影响; 倒 T 形底坎的位置距进水池入口 7.5D, 上部结构高为 0.4H , 宽为 0.1B, 前池中流态得到明显改善, 边侧回漩范围减小。

In order to rectify the bad flow pattern at the forebay of the pump station, in this paper we conducted numerical simulation of the forebay with inverted T-shaped sill based on the Fluent software using the N-S equation and Reliable k-ε turbulence model, and analyzed the influence of the geometrical parameters of the sill on the flow pattern and lateral flow velocity at the forebay. The results showed that without the rectification measure, the flow pattern at the forebay was turbulent. Adding an inverted T-shaped sill could significantly increase the flow rate of the side unit and improve the uniformity of the velocity distribution at the forebay . The location parameter and superstructure size of the inverted T-shaped sill had significant influence on the flow pattern at the forebay . The recommended location of the inverted T-shaped sill is 7.5D to the entrance of the intake pool. The recommended superstructure is 0.4H high and 0.1B wide.

国家自然科学基金( 51779214) ; 江苏省产学研前瞻性联合项目( BY2015061-12) ; 江苏省研究生培养创新工程( KYLX16_1395)