Broad-crested weir operation upstream of a steep stepped spillway

Zhang, Gangfu and Chanson, Hubert (2015). Broad-crested weir operation upstream of a steep stepped spillway. In: Arthur Mynett, Proceedings of the 36th IAHR World Congress: Deltas of the Future and What Happens Upstream. 36th IAHR World Congress, The Hague, Netherlands, (2901-2911). 28 June-3 July 2015.

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Name Description MIMEType Size Downloads
Author Zhang, Gangfu
Chanson, Hubert
Title of paper Broad-crested weir operation upstream of a steep stepped spillway
Conference name 36th IAHR World Congress
Conference location The Hague, Netherlands
Conference dates 28 June-3 July 2015
Convener IAHR
Proceedings title Proceedings of the 36th IAHR World Congress: Deltas of the Future and What Happens Upstream
Series IAHR World Congress Proceedings
Place of Publication The Hague, Netherlands
Publisher IAHR
Publication Year 2015
Year available 2015
Sub-type Fully published paper
Open Access Status Not Open Access
ISBN 9789082484601
Editor Arthur Mynett
Issue 79662
Start page 2901
End page 2911
Total pages 11
Collection year 2016
Language eng
Abstract/Summary New experiments were performed on a large-size stepped spillway facility. The operation of the broad-crested weir was characterised together with the steep (1V:1H) stepped chute. The introduction of a small rounding at the crest’s downstream end was shown to prevent jet deflection. The hydraulics of the weir overflow was examined, and the results showed critical flow conditions (i.e. minimum specific energy) along most portions of the crest, although the pressure distributions were not always hydrostatic and the velocity profiles were not uniform. The stepped chute flow was highly aerated. The two-phase flow in the stepped chute was characterised in details. The air-water flow properties were analysed in terms of the rate of energy dissipation, showing 60% of energy dissipation rate down the first 12 steps.
Keyword Stepped spillways
Broad-crested weir
Physical modelling
Jet deflection
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes https://www.iahr.org/site/cms/contentviewarticle.asp?article=1179 Theme 4

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2016 Collection
 
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Created: Sat, 21 Nov 2015, 23:15:23 EST by Hubert Chanson on behalf of School of Civil Engineering