Vortex dropshaft retrofitting: case of Naples city (Italy) / Giuseppe Del Giudice in Journal of hydraulic research, Vol. 49 N° 6 (Novembre/Décembre 2011)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 804-808 Titre : Vortex dropshaft retrofitting: case of Naples city (Italy) Type de document : texte imprimé Auteurs : Giuseppe Del Giudice, Auteur ; Corrado Gisonni, Auteur Année de publication : 2012 Article en page(s) : pp. 804-808 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Drop structure Hydraulic failure Sewer hydraulics Supercritical flow Vortex shaft 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 work describes the main hydraulic features of vortex dropshafts along with some examples of their mis-designs and consequent malfunction. Laboratory experiments were conducted to test the hydraulic performance of subcritical vortex intakes using supercritical approach flow design basis. The purposes of these drop structures are to: (i) convey the storm runoff towards the sea through the existing sewer system located at lower elevations and (ii) by-pass insufficient sewers. The proper operation of these structures is crucial to prevent flooding and to guarantee the urban safety. This issue is particularly relevant for the sewer system of Naples (Italy), which is strongly constrained by its hilly landscape. Several drop structures were realized to connect the modern urban drainage system to the early sewer mains located at the sea level. This work intends to highlight practical issues to enhance the existing vortex dropshafts, with possible applications to other cases similar to the Neapolitan context. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.622148 [article] Vortex dropshaft retrofitting: case of Naples city (Italy) [texte imprimé] / Giuseppe Del Giudice, Auteur ; Corrado Gisonni, Auteur . - 2012 . - pp. 804-808. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 804-808 Mots-clés : Drop structure Hydraulic failure Sewer hydraulics Supercritical flow Vortex shaft 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 work describes the main hydraulic features of vortex dropshafts along with some examples of their mis-designs and consequent malfunction. Laboratory experiments were conducted to test the hydraulic performance of subcritical vortex intakes using supercritical approach flow design basis. The purposes of these drop structures are to: (i) convey the storm runoff towards the sea through the existing sewer system located at lower elevations and (ii) by-pass insufficient sewers. The proper operation of these structures is crucial to prevent flooding and to guarantee the urban safety. This issue is particularly relevant for the sewer system of Naples (Italy), which is strongly constrained by its hilly landscape. Several drop structures were realized to connect the modern urban drainage system to the early sewer mains located at the sea level. This work intends to highlight practical issues to enhance the existing vortex dropshafts, with possible applications to other cases similar to the Neapolitan context. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.622148

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