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 eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 2 - JOHN F. KENNEDY STUDENT PAPER COMPETITION : Ski-jump-step Energy Dissipators
Ski-jump-step Energy Dissipators
Author : Qian Shangtuo
Given problems such as atomization, energy dissipation and cavitation damage caused by high-speed flows, a new type of energy dissipator called the ski-jump-step energy dissipator was developed in which pre-aeration is achieved through jets generated by ski-jumps and further aeration is achieved via aeration stilling basins. This method provides fully aerated flows for the stepped chute with large unit discharges. The experimental models, which consist of ski-jumps, pre-step sections, aeration stilling basins and stepped chutes, were designed, and the geometric forms and hydraulic characteristics of the energy dissipators were investigated, including the flow patterns, the principle and effectiveness of energy dissipation, the characteristics of the air entrainment and the pressure distributions. Even under 2 conditions of large unit discharges (q = 118.00 m \s), results obtained for the whole steps of the stepped chute demonstrate energy-dissipation ratios as high as 75.8 % and air concentrations of 3.6 %, as well as suitable time-average pressure distributions. The methodology developed herein provides a new approach for energy dissipation in stepped chutes at the large discharges.
File Size : 1,632,655 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
Download Now