Mitigation investigation of flow-induced vibrations at a rehabilitated spillway

Crookston, B. M., Anderson, A., Shearin-Feimster, L. and Tullis, B. P. (2014). Mitigation investigation of flow-induced vibrations at a rehabilitated spillway. In: Hubert Chanson and Luke Toombes, Hydraulic structures and society - Engineering challenges and extremes. 5th IAHR International Symposium on Hydraulic Structures, Brisbane, Australia, (1-8). 25-27 June 2014. doi:10.14264/uql.2014.30

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Author Crookston, B. M.
Anderson, A.
Shearin-Feimster, L.
Tullis, B. P.
Title of paper Mitigation investigation of flow-induced vibrations at a rehabilitated spillway
Conference name 5th IAHR International Symposium on Hydraulic Structures
Conference location Brisbane, Australia
Conference dates 25-27 June 2014
Proceedings title Hydraulic structures and society - Engineering challenges and extremes
Journal name ISHS 2014 - Hydraulic Structures and Society - Engineering Challenges and Extremes: Proceedings of the 5th IAHR International Symposium on Hydraulic Structures
Place of Publication Brisbane, Australia
Publisher The University of Queensland
Publication Year 2014
Year available 2014
Sub-type Fully published paper
DOI 10.14264/uql.2014.30
Open Access Status DOI
ISBN 9781742721156
Editor Hubert Chanson
Luke Toombes
Start page 1
End page 8
Total pages 8
Language eng
Abstract/Summary Linville Land Harbor Dam was recently rehabilitated and provided with a labyrinth spillway to increase flood passage capacity. Nappe vibration, a condition that can occur at hydraulic structures with a free overfall, has been observed for low flows. The associated noise affects a private residence in close proximity to the spillway. As a result, a detailed investigation has been undertaken at the Utah Water Research Laboratory that uses physical modelling (linear weirs) to study mitigation options. Nappe vibration for a fully vented nappe has been observed in the laboratory. Preliminary results indicate that nappe breakers are a less desirable mitigation option due to spacing requirements. Adding roughness to the crest is highly effective as it increases turbulence, perturbs the laminar boundary layer, decreases nappe uniformity, and alters the flow characteristics where the nappe impacts the tailwater.
Keyword Spillway
Labyrinth
Nappe
Vibration
Acoustics
Physical modelling
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

 
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Created: Tue, 13 May 2014, 21:09:45 EST by Anthony Yeates on behalf of Scholarly Communication and Digitisation Service