Discharge coefficient for bottom orifice of vortex chamber / Jan, Chyan-Deng in Journal of hydraulic research, Vol. 49 N° 3 (Mai/Juin 2011)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 49 N° 3 (Mai/Juin 2011) . - pp. 388-391 Titre : Discharge coefficient for bottom orifice of vortex chamber Type de document : texte imprimé Auteurs : Jan, Chyan-Deng, Auteur ; Quang-Truong Nguyen, Auteur Année de publication : 2011 Article en page(s) : pp. 388-391 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Conical hopper Discharge coefficient Jet inflow Orifice Vortex chamber 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 : This research presents investigations on the discharge coefficient of a circular orifice located at the apex of an inverted conical hopper attached to the bottom of a cylindrical vortex chamber. A circular jet inflow tangentially enters the vortex chamber at the top periphery of the conical hopper. Different sizes of orifices and inflow jet discharges were applied in the experiments to investigate the variation of the discharge coefficient. The effect of overflow at the upper outlet on the discharge coefficient was also investigated. Based on the test data, empirical relations for the discharge coefficient are proposed. It is found that in the presence of tangential jet inflow, the discharge coefficient is considerably smaller than that without tangential jet inflow and the presence of overflow significantly reduces it. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.572442 [article] Discharge coefficient for bottom orifice of vortex chamber [texte imprimé] / Jan, Chyan-Deng, Auteur ; Quang-Truong Nguyen, Auteur . - 2011 . - pp. 388-391. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 3 (Mai/Juin 2011) . - pp. 388-391 Mots-clés : Conical hopper Discharge coefficient Jet inflow Orifice Vortex chamber 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 : This research presents investigations on the discharge coefficient of a circular orifice located at the apex of an inverted conical hopper attached to the bottom of a cylindrical vortex chamber. A circular jet inflow tangentially enters the vortex chamber at the top periphery of the conical hopper. Different sizes of orifices and inflow jet discharges were applied in the experiments to investigate the variation of the discharge coefficient. The effect of overflow at the upper outlet on the discharge coefficient was also investigated. Based on the test data, empirical relations for the discharge coefficient are proposed. It is found that in the presence of tangential jet inflow, the discharge coefficient is considerably smaller than that without tangential jet inflow and the presence of overflow significantly reduces it. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.572442

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