Deflector Effect on Chute Flow
This article has a reply.
VIEW THE REPLYThis article has a reply.
VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 139, Issue 4
Abstract
Jet deflection and energy dissipation of ski jumps guarantee the safety of hydraulic structures. Deflectors on spillways and bottom outlets are mostly complex constructions. The aim of this study is to find simple-shaped deflectors allowing for jet deflection into the tailwater, thereby characterizing the parameters of the trajectory under different approach flow conditions. The test program included eight right-angled tetrahedrons and two vertical plate deflectors. A systematic variation of the approach flow depth and Froude number, in combination with different deflector alignments, resulted in basic principles for deflector design. To study scale effects caused by viscosity and surface tension, three symmetric deflectors were tested as a model family at different approach flow depths. The results indicate the importance of the approach flow Froude number and the relative deflector height on the jet trajectory. The relevant jet parameters, including the deflection angle, the maximum jet elevation, and the jet impact onto the tailwater channel, are specified.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors thank Michael Kurmann for having conducted the tests during his master’s thesis.
References
Chaudhry, M. H. (1993). Open-channel flow, Prentice Hall, Englewood Cliffs, NJ.
Hager, W. H. (2010). Wastewater hydraulics, theory and practice, 2nd Ed., Springer, Berlin.
Heller, V. (2011). “Scale effects in physical hydraulic engineering models.” J. Hydraul. Res., 49(3), 293–306.
Khatsuria, R. M. (2005). Hydraulics of spillways and energy dissipators, Marcel Dekker, New York.
Lowe J., III, and Scherich, E. T. (1988). “Special design considerations—Channel erosion.” Advanced dam engineering for design, construction, and rehabilitation, R. B. Jansen, ed., Van Nostrand Reinhold, New York.
Novak, P., Guinot, V., Jeffrey, A., and Reeve, D. E. (2010). Hydraulic modelling— An introduction, Spon Press, Abingdon, UK.
Şentürk, F. (1994). Hydraulics of dams and reservoirs, Water Resources Publications, Highlands Ranch, CO.
Sigloch, H. (2009). TechnischeFluidmechanik, Springer, Berlin (in German).
Steiner, R., Heller, V., Hager, W. H., and Minor, H.-E. (2008). “Deflector ski jump hydraulics.” J. Hydraul. Eng., 134(5), 562–571.
U.S. Bureau of Reclamation (USBR). (1978). “Hydraulic design of stilling basins and energy dissipators.” Engineering Monograph No. 25, Denver.
Vischer, D. L., and Hager, W. H. (1998). Dam hydraulics, Wiley, Chichester, UK.
Information & Authors
Information
Published In
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 21, 2011
Accepted: Jun 20, 2012
Published online: Mar 15, 2013
Published in print: Apr 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.