IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Identification of hydraulic instabilities in a storm sewer system – an experimental investigation of...
Identification of hydraulic instabilities in a storm sewer system – an experimental investigation of Alvaro Chaves penstock
Author : JULIANA KAIBER DA SILVA, ROGÉRIO DORNELLES MAESTRI & ANA LUIZA DE OLIVEIRA BORGES
Aiming to overcome recurrent floods in main avenues in Porto Alegre (Brazil), the Alvaro Chaves Penstock (ACP) storm sewer system was built in 2008. The system has an unusual design, combining an on-line detention reservoir with a penstock in the same structure. Moreover, the rectangular cross-sectional area decreases to downstream direction, there are abrupt sharp edges conduit contractions (vertical and horizontal) and 90° bend with a reduction of rectangular cross-sectional. In February 2013, during a strong rainstorm, ACP has presented a structural collapse. In order to investigate the ACP, a Perspex-glass partial physical model of the ACP was set up at the Instituto de Pesquisas Hidráulicas of the Universidade Federal do Rio Grande do Sul. The geometric scale factor is 1:15, resulting in a 26 m length, variable height (16cm - 42cm) and width (20cm - 50cm). Qualitative observations reveal oscillatory and translational waves with moving hydraulic jumps, air entrapment and other problems. Three main filling patterns were recognized, considering both air entrapment and pressurization process.
File Size : 1,128,138 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 28/10/2015
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