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首页> 外文期刊>Canadian Journal of Civil Engineering >Numerical study of an innovative fish ladder design for perched culverts
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Numerical study of an innovative fish ladder design for perched culverts

机译:涵洞创新鱼梯设计的数值研究

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摘要

A fish ladder designed to facilitate fish passage at the outlet end of perched culverts is investigated with a 3D computational fluid dynamics model. The fish ladder consists of a series of alternating arch baffles with geometries providing options for fish passage over varying flow and debris conditions within the ladder. At high flows, the baffle's protruding center arch increases pool depth, reducing the volumetric bulk turbulence of the pools and improving fish habitat. The arch baffle is compared to a standard baffle design currently in use and demonstrates potential advantages for fish passage. A recirculation zone of low velocity occupies a large volume of the pool believed to provide appropriate hydraulic habitat for resting and staging jump attempts upstream. This numerical study provides an acceptable design for future physical prototype testing in the laboratory or field to verify hydraulics and evaluate fish passage effectiveness.
机译:使用3D计算流体动力学模型研究了旨在促进鱼在栖息涵洞的出口通过的鱼梯。鱼梯由一系列交替的拱形挡板组成,这些挡板的几何形状为梯子中变化的水流和碎屑条件下的鱼类通过提供了选择。在高流量下,挡板的突出中心拱形增加了水池的深度,减少了水池的体积大湍流并改善了鱼类的栖息地。将弓形挡板与当前使用的标准挡板设计进行了比较,证明了鱼通过的潜在优势。低速回流区占据了水池的大部分,被认为可以为上游的跳跃尝试和休息提供适当的水力栖息地。该数值研究为实验室或现场将来的物理原型测试提供了可接受的设计,以验证水力学并评估鱼通过效率。

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