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Streamwise bars in fish-friendly angled trashracks

Raynal, Sylvain and Chatellier, Ludovic and Courret, Dominique and Larinier, Michel and David, Laurent Streamwise bars in fish-friendly angled trashracks. (2014) Journal of Hydraulic Research, 52 (3). 426-431. ISSN 0022-1686

(Document in English)

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Official URL: http://dx.doi.org/10.1080/00221686.2013.879540


Experimental results for fish-friendly trashracks placed in an open-water channel are presented. Eighteen angled trashracks were used to test different bar spacings, bar shapes and rack angles. Each model trashrack comprised two horizontal supports with regularly spaced slots adjusted to compensate for the trashrack angle, i.e. maintain the vertical bars “streamwise” (parallel to flow). Water depths and velocity profiles were acquired upstream and downstream of each rack configuration. The results reveal that the head-loss coefficient for angled racks with streamwise bars does not depend on the rack angle and can be calculated with equations for racks perpendicular to the channel. Upstream velocity profiles along the rack are not significantly affected by the rack angle and downstream transverse profiles are nearly uniform. A comparison with conventional angled trashracks with bars set perpendicular to the rack revealed the many advantages of streamwise bars.

Item Type:Article
Additional Information:Thanks to Taylor & Francis publisher. The original publication is available at http://www.tandfonline.com
HAL Id:hal-01116497
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechnique (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Poitiers (FRANCE)
Other partners > Office national de l'eau et des milieux aquatiques - ONEMA (FRANCE)
Laboratory name:
Deposited On:30 Oct 2014 15:00

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