期刊
ECOLOGICAL ENGINEERING
卷 100, 期 -, 页码 344-353出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecoleng.2016.10.065
关键词
Fishway design; Fish migration; Tailrace; CFD; ADCP; OpenFOAM
Restoration of upstream fish passage requires construction of efficient fishways. Selection of attraction flow rates and entrance velocities is one of the fundamental research tasks on medium-sized German rivers as general recommendations are ambiguous. We used a transient 3D Computational Fluid Dynamics model of a hydropower dam tailrace calibrated with Acoustic Doppler Current Profiler velocity data and Detached-Eddy Simulation turbulence modeling to produce seven flow fields. Hydraulic results were linked to fish performance by means of fish-size speed relations (ethohydraulic scale). Resulting attraction flow relationships agree well with literature recommendations if the competing flow is defined as the adjacent turbine flow. Further, we found that entrance velocity clearly determines the downstream influence of the attraction flow plume over the attraction flow rate if no rapid mixing is present. (C) 2016 The Authors. Published by Elsevier B.V.
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