Comparison between empirical formulae of intake vortices / Yingkui Wang in Journal of hydraulic research, Vol. 49 N° 1 (Janvier/Fevrier 2011)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 49 N° 1 (Janvier/Fevrier 2011) . - pp. 113-116 Titre : Comparison between empirical formulae of intake vortices Type de document : texte imprimé Auteurs : Yingkui Wang, Auteur ; Chunbo Jiang, Auteur ; Dongfang Liang, Auteur Année de publication : 2011 Article en page(s) : pp. 113-116 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Air-core vortex Axial symmetric flow Hydraulic intake Navier-Stokes equations Vortex Index. décimale : 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 Résumé : The hydrodynamic properties of free surface vortices at hydraulic intakes were investigated. Based on the axisymmetric Navier-Stokes equations and empirical assumptions, two sets of formulations for the velocity distributions and the free surface profiles are proposed and validated against measurements available in the literature. Compared with previous formulae, the modifications based on Mih's formula are found to greatly improve the agreement with the experimental data. Physical model tests were also conducted to study the intake vortex of the Xiluodu hydroelectric project in China. The proposed velocity distribution formula was applied to the solid boundary as considered by the method of images. A good agreement was again observed between the prediction and the measurements. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.informaworld.com/smpp/content~db=all~content=a933343847~frm=titlelink [article] Comparison between empirical formulae of intake vortices [texte imprimé] / Yingkui Wang, Auteur ; Chunbo Jiang, Auteur ; Dongfang Liang, Auteur . - 2011 . - pp. 113-116. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 1 (Janvier/Fevrier 2011) . - pp. 113-116 Mots-clés : Air-core vortex Axial symmetric flow Hydraulic intake Navier-Stokes equations Vortex Index. décimale : 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 Résumé : The hydrodynamic properties of free surface vortices at hydraulic intakes were investigated. Based on the axisymmetric Navier-Stokes equations and empirical assumptions, two sets of formulations for the velocity distributions and the free surface profiles are proposed and validated against measurements available in the literature. Compared with previous formulae, the modifications based on Mih's formula are found to greatly improve the agreement with the experimental data. Physical model tests were also conducted to study the intake vortex of the Xiluodu hydroelectric project in China. The proposed velocity distribution formula was applied to the solid boundary as considered by the method of images. A good agreement was again observed between the prediction and the measurements. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.informaworld.com/smpp/content~db=all~content=a933343847~frm=titlelink

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