王晓刚,李云,何飞飞,等. 竖缝式鱼道休息池水动力特性研究[J]. 水利水运工程学报,2020(1):40-50. doi: 10.12170/20181130002
引用本文: 王晓刚,李云,何飞飞,等. 竖缝式鱼道休息池水动力特性研究[J]. 水利水运工程学报,2020(1):40-50. doi: 10.12170/20181130002
(WANG Xiaogang, LI Yun, HE Feifei, et al. A study of hydrodynamic characteristics of resting pools of vertical slot fishway[J]. Hydro-Science and Engineering, 2020(1): 40-50. (in Chinese)). doi: 10.12170/20181130002
Citation: (WANG Xiaogang, LI Yun, HE Feifei, et al. A study of hydrodynamic characteristics of resting pools of vertical slot fishway[J]. Hydro-Science and Engineering, 2020(1): 40-50. (in Chinese)). doi: 10.12170/20181130002

竖缝式鱼道休息池水动力特性研究

A study of hydrodynamic characteristics of resting pools of vertical slot fishway

  • 摘要: 诸多鱼类会在休息池内,特别是转弯段休息池内出现滞留或上溯困难。通过建立三维RNG k-ε紊流模型,分析了竖缝位置、池室长度、休息池内增设辅助隔板等对直段休息池、转弯段休息池水动力特性的影响。结果发现,休息池内水流紊动能、紊动耗散率远低于普通池室,且休息池越长,紊动能及紊动耗散率越低,休息空间越大;竖缝位置对直段休息池水流特性影响不大,规范规定的休息池池长是合理的。对于29°弯段休息池,竖缝异侧布置更有利,对于180°弯段休息池,同侧布置更有利;由于180°弯段休息池池室中央存在大范围高流速回流区,应予充分重视。在休息池内增设辅助隔板能有效消除池室中央大回流区,且大幅增加低流速区面积,值得推广应用。

     

    Abstract: Several studies have shown that many fishes will be detained in the fishway resting pools, especially in the turning section of the resting pool. A 3D numerical model using the RNG k-ε turbulent closure is applied to study the influences of vertical slot position, resting pool length, and auxiliary baffle placed at the resting pool on the hydraulic characteristics of the resting pools located in the straight section and turning section. The research results show that the turbulent kinetic energy and turbulent energy dissipation rate of the water flow in the resting pools are much lower than those in the ordinary regular pools of the fishway, and the longer the fishway resting pool is, the lower the turbulent kinetic energy and the turbulent energy dissipation rate of the water flow, and the larger the resting space is in the resting pools. The position of the vertical slot of the fishway has little influence on the flow characteristics of the resting pool located at the straight section. It is reasonable that the length of the fishway resting pool specified in the code should be more than twice that of the ordinary pool. For the fishway resting pools located at 29° turning section, the layout of the vertical slot at opposite side is more advantageous, while for the fishway resting pools located at 180° turning section, the layout of the vertical slot at the same side is more advantageous. Due to the existence of a large area of high velocity reverse current zone in the center of the fishway resting pools located at 180° turning section, full attention should be paid to it. Adding an auxiliary baffle in the fishway resting pools can effectively eliminate the large reverse current zone in the center of the pools and greatly increase the areas of the velocity zone, which is worthy of popularization and application.

     

/

返回文章
返回