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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 7: Hydroinformatics : Large eddy simulation of flow characteristics in hydraulic aeration facilities with sudden lateral e...
Large eddy simulation of flow characteristics in hydraulic aeration facilities with sudden lateral enlargement and vertical drop
Author : Li Guojing, Dai Guangqing, Yang Qing, Ma Xudong
In order to study the flow characteristics in hydraulic aeration facilities with sudden lateral enlargement and vertical drop at the mid-gate chamber outlet, the numerical simulation was carried out with large eddy simulation (LES) model and VOF method. The numerical results showed that the reflection flow was formed along the side cavity region when the the length of side cavity region was too short or longer than the bottom cavity region. Water intrusion into bottom cavity region affected the local aeration density. It mainly caused the air entrained the flow that the flow dynamically contacted with the wall. the upper part of the side cavity region was longer than the lower part due to gravity. The size of water-wing become bigger when the side cavity region increased, a large water-wing caused unfavourable flow conditions and decreased aeration density of the flow near side wall.
File Size : 729,916 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 7: Hydroinformatics
Date Published : 01/07/2011
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