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Fish-friendly trashracks: headloss formula and clogging effect for inclined racks

Raynal, Sylvain and Chatellier, Ludovic and David, Laurent and Courret, Dominique and Larinier, Michel Fish-friendly trashracks: headloss formula and clogging effect for inclined racks. (2012) In: 2nd IAHR Europe Congress, 27 June 2012 - 29 June 2012 (Munich, Germany).

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Abstract

Experimental results for fish-friendly trashracks placed in an open water channel are presented. Trashrack models with different bar shape, spacing and inclination are tested.The numerous configurations provide results on head losses which are fitted by a new formula which takes into account all these parameters. It especially separates the blocking ratio due to bars, which is impacted by the inclination, from that due to transversal elements, such as spacer rows, whose effect on the flow is not altered with the rack inclination. Clogging, which is more likely to occur more on grids with thin space between bars, was simulated with a set of perforated plates. Its influence on head losses has been investigated, and a small adaptation of the formula proposed for clean grids was sufficient to obtain satisfactory results for clogged ones.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Mécanique et d'Aérotechnique - ENSMA (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Poitiers (FRANCE)
Other partners > Office national de l'eau et des milieux aquatiques - ONEMA (FRANCE)
Laboratory name:
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Deposited By: Dominique COURRET
Deposited On:07 Apr 2014 08:29

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