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.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 4: Responding to Shifting Water Resources : Energy dissipation and air entrainment on stepped spillways with non-uniform cavity sizes
Energy dissipation and air entrainment on stepped spillways with non-uniform cavity sizes
Author : S. Felder1 and H. Chanson1
An experimental study was conducted on a large size stepped spillway model with a moderate slope (26.6) for a range of discharges between 0.020 and 0.237 m3/s. In some experiments, the stepped chute was equipped with uniform steps of 5 and 10 cm heights respectively. In addition several non-uniform configurations with combinations of 5 and 10 cm high steps were investigated. For each configuration, the air-water flow properties were measured for several discharges. The study yielded some challenging outcomes in terms of energy dissipation and aeration on stepped spillways with non-uniform cavity sizes. A comparative analysis with the stepped spillways with uniform step heights showed that the energy dissipation rate, the residual head, the flow resistance and the mean air concentration were close for all geometries. This might be used for the design of prototype spillways with non-uniform step heights, but the flow pattern of the non-uniform step configurations showed some instabilities. A stepped spillway design with uniform step heights is the preferable design option.
File Size : 1,875,256 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 4: Responding to Shifting Water Resources
Date Published : 01/07/2011
Download Now