仿生态鱼道出口衔接段管桩优化数值模拟研究
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1.华北水利水电大学;2.黄河勘测规划设计研究院有限公司

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TV135

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Numerical Simulation Study on Optimization of Pipe Pile in Connection Section of the Outlet of Nature-Like Fishway
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North China University of Water Resources and Electric Power

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    摘要:

    针对大藤峡水利枢纽建造生态景观湖+仿生态鱼道结合的新型鱼道中出口衔接段流速过大不能满足鱼类正常生殖洄游问题,在出口衔接段设置多种不同直径圆形、方形梅花桩型式的管桩结构,并采用MIKE3进行数值模拟。分析了四种管桩布置方案表、中、底层流速分布和每组管桩群后横断面的水力特性;结果表明布设管桩结构后衔接段水流流态平稳,布置直径为0.25m的圆形管桩和边长为0.25m的方形管桩的两种方案下水流流速满足目标鱼类上溯条件;方形管桩的流速更低、更适宜鱼类上溯。出口衔接段设置管桩结构可以有效的改善水流流态、降低流速,在管桩后低流速区休憩的上溯鱼群可为上游生态景观湖添色。

    Abstract:

    The new fishway with the combination of ecological landscape lake and ecological imitation fishway was constructed for Dateng Gorge Hydraulic Complex. It solves the problem that the flow velocity in the outlet connection section of nature-like fishways too large to meet the normal reproduction and migration of fish. A variety of pipe pile structures with different diameters of circular and square plum-blossom piles are set up in the outlet connection section, and MIKE 3 is used for numerical simulation. The table of four kinds of pipe pile layout, the distribution of middle and bottom velocity and the hydraulic characteristics of the cross section behind each group of pipe pile group are analyzed. The results show that the flow pattern of the connecting section is stable after the pipe pile structure is laid. The flow velocity of round pipe pile with diameter of 0.25m and square pipe pile with side length of 0.25m satisfies the upstream condition of target fish. The square pipe pile has a lower flow rate and is more suitable for fish ascending. The pipe pile structure in the outlet connection section can effectively improve the flow pattern and reduce the velocity. Upstream fish resting in the low velocity zone behind the pipe pile can add color to the ecological landscape of the upstream lake.

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王鹏涛,徐美,陈申. 仿生态鱼道出口衔接段管桩优化数值模拟研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2021-11-29
  • 最后修改日期:2022-05-03
  • 录用日期:2022-05-05
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