垂直竖缝式鱼道的三维数值模拟

3D Numerical Simulation of Vertical Slot Fishways

本文基于Fluent软件中的RNGk-e湍流模型,以多布电站生态鱼道为研究对象,对竖缝式鱼道进行了数值模拟研究。结果表明:有效运行水深在2.5m时,三维鱼道流场内的最大速度出现在竖缝处,最大为1.23 m/s,对目标鱼种巨须裂腹鱼的影响最大,对异齿裂腹鱼最小;池室中湍动能最大值出现在竖缝附近,为0.051 m^2/s2,其与主流流速的变化规律一致;湍流强度最大值出现在池室中层竖缝处,为1.4,其与湍动能的分布范围一致;休息池内的水流掺混,主流能量消耗效果较好,可为鱼类的上溯提供休息的场所。本文的研究可为鱼道的实际工程提供一定的参考。

In this paper, based on RNG turbulence model in Fluent software, the ecological fishway of Dobu hydropower station was studied. The results showed that when the effective running water depth was 2.5 m, the maximum speed in the three-dimensional fish flow field appeared at the vertical joint with the maximum speed of 1.23 m/s, which had the greatest influence on Schizothorax macropogon and the lest influence on Schizothorax oconnori. The maximum turbulent kinetic energy in the chamber was near the vertical joint, which was 0.051 m^2/s2 and consistent with the change of the mainstream flow velocity, and the maximum turbulence intensity appeared at the vertical seam of the middle of the pool, which was 1.4 and consistent with the distribution of turbulent kinetic energy. The water flow in the rest pool was mixed, and the mainstream energy consumption was better, which can provide a resting place for the fish to go up. The research in this paper can provide some references for the actual engineering of the fish pass.