竖缝式双池室鱼道与传统VSF水力特性对比

Comparison of Hydraulic Characteristics between Vertical-slot Double-pool Fishway and Conventional Vertical Slot Fishway

鱼道是为保障鱼类的生存繁衍,保护洄游性水生生物通过水坝、水闸等障碍物的重要通道。采用RNG k-ε模型对竖缝式双池室鱼道和传统竖缝式鱼道(VSF)进行数值模拟计算,对比分析各项水力特性。结果表明:与传统VSF相比,竖缝式双池室鱼道流场的主流区数量更多、回流区更稳定;鱼道具有丰富的流速信息,且各竖缝处的最大流速和平均流速均小于传统VSF的50%;鱼道3条主流区位置分布均匀,流速综合衰减率较传统VSF高3%左右。竖缝式双池室鱼道作为一种新型VSF,其水力特性达到了传统VSF结构优化设计的目的,相关成果可为鱼道工程建设提供参考。

Fishways are vital passages ensuring fish reproduction and survival and safeguarding migratory aquatic organisms passing through barriers like dams and sluices.The RNG k-εmodel is employed for numerical simulations of vertical-slot double-pool fishway and traditional vertical slot fishway(VSF).Hydraulic characteristics are compared and analyzed.Compared to traditional VSF,the vertical-slot double-pool fishway exhibits more mainstream zones and stable backflow zones,and the maximum and average flow velocity at each slot are less than half of those of traditional VSF,with three evenly distributed mainstream zones and a 3%higher integrated velocity decay rate.As an advanced VSF design,the vertical-slot double-pool fishway has optimized hydraulic features,offering valuable insights for fishway engineering.