摘要
为了探索仿生态鱼道结构型式变化对水力特性的影响,以改善仿生态鱼道水力学条件,本文采用RNG k-ε紊流模型对竖缝式和竖缝-表孔组合式两种不同鱼道池室结构型式进行数值模拟计算。研究表明:竖缝式结构下,池室主流呈"S"形轨迹,竖缝水深、流速分布沿程较均匀,最大竖缝流速为1.31 m/s,最大紊动能为0.124 m2/s2。竖缝-表孔组合式鱼道流速沿程变化较大,表孔最大流速达到1.52 m/s,但同断面竖缝流速仅为0.50 m/s,最大紊动能为0.140 m2/s2,可为鱼类上溯提供丰富的水流条件,但由于表孔增加了过流断面,组合式结构消耗流量较多,可根据实际情况进行综合考虑选择。
In order to explore the impact of the structural pattern change of nature-imitated fishway on its hydraulic characteristics to improve the hydraulic conditions of the nature-imitated fishway,the relevant numerical simulative calculations on the two different patterns of the pool room structures of both the vertical slot fishway and the vertical slot-surface outlet combined fishway are carried out by means of RNG k-εturbulence model.The study shows that the main water flow inside the fishiway pool room exhibits a"S"-shaped trajectory with more uniform on-way distributions of both the water depth and flow velocity of the vertical slot for the vertical slot structure,while the maximum flow velocity of the vertical slot is 1.31 m/s and the maximum turbulent kinetic energy is 0.124 m~2/s~2 as well.The change of the on-way flow velocity of the vertical slot-surface outlet combined fishway is larger with maximum flow velocity of the surface outlet of 1.52 m/s,but the flow velocity of the vertical slot of the same section is only 0.50 m/s with the turbulent kinetic energy of 0.140 m~2/s~2,thus better flow condition can be provided for the relevant anadromous fishes;however,more water flow is to be consumed by the combined fishway structure due to the increase of the flow-passing section made by the surface outlet,and then it is can be selected through the relevant comprehensive consideration.
作者
马卫忠
梁砚
王猛
冯铭
MA Weizhong;LIANG Yan;WANG Meng;FENG Ming(PowerChina Guiyang Engineering Corporation Limited,Guiyang 550081,Guizhou,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei,China;Fengman Dam Reconstruction Project Construction Bureau,Jilin 132108,Jilin,China)
出处
《水利水电技术（中英文）》
北大核心
2020年第S02期122-129,共8页
Water Resources and Hydropower Engineering
基金
中国电力建设股份有限公司科技项目(DJ-ZDXM-2014-04)
关键词
仿生态鱼道
水力特性
紊动能
数值模拟
nature-imitated fishway
hydraulic characteristics
turbulent kinetic energy
numerical simulation
