Decay of Turbulence Downstream of a Stilling Basin
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VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 131, Issue 9
Abstract
Turbulence must be modeled accurately to simulate river processes, particularly transport of aqueous oxygen and nitrogen. Spillway operations affect downstream turbulence, but there has been little research on turbulence intensities downstream of stilling basins. For this study, laboratory measurements were taken on a three-dimensional, physical model of McNary Dam, Columbia River, United States to determine how the turbulence, initially generated by spillway flow, decreases with distance downstream. The experiments also examined how flow rate, tailwater depth, and the presence of spillway deflectors affect turbulence. A mathematical analysis was used to predict turbulent kinetic energy with distance, and good agreement was found between laboratory measurements and numerical predictions. Turbulence production generated by channel bed roughness was found to be small compared to turbulent energy dissipation, and the effect of flow separation related to bed irregularities on turbulence production was found to be negligible.
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Acknowledgments
The first writer would like to recognize the University of Minnesota Graduate School for the Doctoral Dissertation Fellowship that provided funding for this research. The writers would also like to thank Laurin Yates, Curtis Blades, John Ashley, and Bill Preslan, as well as many other people at ERDC for their assistance. The first writer would also like to thank Margaret Petersen for her assistance with this manuscript.
References
Launder, B. E., and Spalding, D. B. (1972). Lectures in mathematical models of turbulence, Academic, New York.
Limerinos, J. T. (1970). “Determination of the Manning coefficient from measured bed roughness in natural channels.” Water Supply Paper 1898-B, USGS, Center, Miss.
Long, D., Steffler, P. M., and Rajaratnam, N. (1990). “LDA study of flow structure in submerged hydraulic jumps.” J. Hydraul. Res., 28(4), 437–460.
Nezu, I., and Nakagawa, H. (1993). Turbulence in open-channel flows, Balkema, Rotterdam, The Netherlands.
Pope, S. B. (2000). Turbulent flows, Cambridge Univ. Press, Cambridge, U.K.
Wahl, T. L. (2000). “Analyzing ADV data using WinADV.” Proc., Joint Conf. on Water Resources Engineering and Water Resources Planning and Management, Minneapolis.
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Published In
Journal of Hydraulic Engineering
Volume 131 • Issue 9 • September 2005
Pages: 825 - 829
Copyright
© 2005 ASCE.
History
Received: Nov 22, 2002
Accepted: Oct 5, 2004
Published online: Sep 1, 2005
Published in print: Sep 2005
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