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Titre :
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Obstacle-Reynolds-number based analysis of local scour at submerged cylinders (2011)
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Auteurs :
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Thomas Euler, Auteur ;
Jurgen Herget, Auteur
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Type de document :
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Article : texte imprimé
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Dans :
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Journal of hydraulic research (Vol. 49 N° 2, Mars/Avril 2011)
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Article en page(s) :
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pp. 267-271
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Note générale :
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Hydraulique
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Langues :
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Anglais
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Index. décimale :
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627 (Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques)
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Tags :
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Local scour Obstacle mark Reynolds number Open channel flow Submerged obstacle
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Résumé :
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A simple process-based, analytical approach is developed and validated herein to determine the local scour at obstacles in the fluvial environment. It is based on the obstacle Reynolds and Froude numbers. Clear-water flume experiments were conducted to investigate the local scour depths at submerged cylinders in coarse uniform sand. The resulting scour depths were correlated with an analytical model and validated with two data sets on local scour at submerged and emergent cylinders. The size of the projected frontal obstacle area in relation to the mean flow velocity has a significant effect on the scour hole shape and depth. A power law function is derived that satisfactorily describes the present scour depth data. The approach is limited to near-equilibrium clear-water scour, uniform sediment and excludes particle density effects.
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DEWEY :
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627
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ISSN :
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0022-1686
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En ligne :
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http://www.tandfonline.com/doi/abs/10.1080/00221686.2010.547719
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