An experimental study on fish-friendly trashracks - Part 2. Angled trashracks

Experimental results for fish-friendly trashracks placed in an open water channel are presented. Model trashracks with different bar shapes, spacing and angles were tested. The numerous configurations provided results on head losses and on changes in velocity along the rack for a large range of situ...

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Bibliographic Details
Published in:Journal of hydraulic research 2013-02, Vol.51 (1), p.67-75
Main Authors: Raynal, Sylvain, Chatellier, Ludovic, Courret, Dominique, Larinier, Michel, David, Laurent
Format: Article
Language:English
Subjects:
Angled trashrack
Channels
Computational fluid dynamics
downstream migration
Earth sciences
Earth, ocean, space
Engineering Sciences
Exact sciences and technology
experimental hydraulics
Fish
Fluid flow
Fluid mechanics
Fluids mechanics
head loss
Hydraulics
Hydrology
Hydrology. Hydrogeology
Mathematical analysis
Mathematical models
Mechanics
Physics
Racks
Studies
velocity distribution
Velocity measurement
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Summary:Experimental results for fish-friendly trashracks placed in an open water channel are presented. Model trashracks with different bar shapes, spacing and angles were tested. The numerous configurations provided results on head losses and on changes in velocity along the rack for a large range of situations, including fish-friendly trashracks. Previous head-loss equations found in the literature were applied to these configurations and were compared with measurements. A new head-loss equation is proposed that takes into account the effect of the different tested parameters. Velocity measurements provided new results and answers concerning downstream-migration aspects such as admissible approach velocities and guidance efficiency as a function of the trashrack angle.
ISSN:0022-1686
1814-2079
DOI:10.1080/00221686.2012.753647