Flow Due to Multiple Jets Downstream of a Barrage: Experiments, 3D Computational Fluid Dynamics, and Depth-Averaged Modeling
Publication: Journal of Hydraulic Engineering
Volume 139, Issue 7
Abstract
The flow through and downstream of a row of seven open draft tubes in a barrage has been investigated through laboratory experiments in a wide flume, a three-dimensional (3D) computational fluid dynamics simulation, and a two-dimensional depth-averaged computation. Agreement between the experiments and the 3D modeling is shown to be good, including the prediction of an asymmetric Coandă effect. One aim is to determine the distance downstream at which depth-averaged modeling provides a reasonable prediction; this is shown to be approximately 20 tube diameters downstream of the barrage. Upstream of this, the depth-averaged modeling inaccurately predicts water level, bed shear, and the 3D flow field. The 3D model shows that bed shear stress can be markedly magnified near the barrage, particularly where the jets become attached.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
Support from the School Doctoral Training Account provided by the EPSRC is gratefully acknowledged.
References
Ahmadian, R., Falconer, R. A., and Lin, B. (2010). “Hydro-environmental modelling of the proposed Severn barrage, UK.” Proc. ICE-Energy, 163(3), 107–117.
Bondi, H. (1981). “Tidal power from the Severn Estuary.” Vol. 1, Report to the Secretary of State for Energy prepared by the Severn Barrage Committee. Energy paper 46. Dept. of Energy, HMSO, London, UK.
Burrows, R., Walkington, I. A., Yates, N. C., Hedges, T. S., Wolf, J., and Holt, J. (2009). “The tidal range energy potential of the West Coast of the United Kingdom.” Appl. Ocean Res., 31(4), 229–238.
Électricité de France (EDF). (2011). “L’usine maremotrice de la Rance: 40 ans d’exploitation au service d’une production d’electricite inepuisable sans .” Division Production Ingénierie Hydraulique, Unité de Production Centre-GEH Ouest, Dinard Cedex.
Energy Saving Now. (2000). “Tidal power plants.” 〈http://energy.saving.nu/hydroenergy/tidal.shtml〉 (Nov. 15, 2012).
Johnston, A. J., and Halliwell, A. R. (1986). “Jet behaviour in shallow receiving water.” Proc. Inst. Civ. Eng., 81(4), 549–568.
Launder, B. E., and Spalding, D. B. (1974). “The numerical computation of turbulent flows.” Comput. Meth. Appl. Mech. Eng., 3(2), 269–289.
Law, A. W.-K., and Herlina (2002). “An experimental study on turbulent circular wall jets.” J. Hydraul. Eng., 128(2), 161–174.
Lipari, G., and Stansby, P. K. (2011). “Review of experimental data on incompressible turbulent round jets.” Flow, Turbulence and Combustion, 87(1), 79–114.
Pani, B. S. (2012). Turbulent jets: A point-source method for hydraulic engineering, Cambridge University Press, New Delhi, India.
Raiford, J. P., and Khan, A. A. (2009). “Investigation of circular jets in shallow water.” J. Hydraul. Res., 47(5), 611–618.
Reba, I. (1966). “Applications of the Coandă Effect.” Sci. Am., 214(6), 84–92.
Rowland, J. C., Stacey, M. T., and Dietrich, W. E. (2009). “Turbulent characteristics of a shallow wall-bounded plane jet: Experimental implications for river mouth hydrodynamics.” J. Fluid Mech., 627, 423–449.
Shih, T.-H., Liou, W. W., Shabbir, A., Yang, Z., and Zhu, J. (1994). “A new eddy viscosity model for high Reynolds number turbulent flows—Model development and validation.”, Center for Modeling of Turbulence and Transition, Institute for Computational Mechanics in Propulsion, NASA Lewis Research Center, Cleveland, OH.
Stansby, P. K. (2003). “A mixing length model for shallow turbulent wakes.” J. Fluid Mech., 495, 369–384.
Stansby, P. K. (2006). “Limitations of depth-averaged modelling of shallow wakes.” J. Hydraul. Eng., 132(7), 737–740.
STAR-CCM+ [Computer software]. Melville, NY, CD-Adapco.
Wu, S., and Rajaratnam, N. (1990). “Circular turbulent wall jets on rough boundaries.” J. Hydraul. Res., 28(5), 581–589.
Xia, J., Falconer, R. A., and Lin, B. (2010). “Hydrodynamic impact of a tidal barrage in the Severn Estuary, UK.” Renewable Energy, 35(7), 1455–1468.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 139 • Issue 7 • July 2013
Pages: 754 - 762
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jul 13, 2012
Accepted: Dec 20, 2012
Published online: Dec 22, 2012
Published in print: Jul 1, 2013
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.