Block Ramp Design for Efficient Energy Dissipation
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VIEW THE REPLYPublication: Journal of Energy Engineering
Volume 136, Issue 1
Abstract
Block ramp structure can be a part of a layout of microhydel scheme, depending upon the conditions of topography and geology at the site. Block ramps transmit the flow of stream to a lower level inducing kinetic energy dissipation. Block ramps consists of base material in the form of stones inducing roughness whereas stepped chutes are overflowing structures which consists of step configuration at the bottom of the flowing stream. As there is a common objective of energy dissipation of flow, the geometrical elements of block ramps and stepped chutes are considered to be comparable under similar hydraulic conditions of skimming flow. This paper analyzes the experimental results on both these structures. A mathematical model in dimensionless form is proposed herein, which correlates the representative bed material size of block ramp with the step height of stepped chute. This correlation is expected to facilitate the design of block ramps using the literature available on stepped chutes.
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Acknowledgments
The writers express their gratitude to the Ministry of Human Resource Development, Government of India for financial help given to the research project.
References
Chanson, H. (1994). Hydraulic design of stepped cascades, channels, weirs and spillways, Pergamon, Tarrytown, N.Y.
Ghare, A. D., Porey, P. D., and Ingle, R. N. (2004). “Aerosol flow toe velocity model for stepped spillway under skimming flow regime.” Proc., Hydraulic Engineering: Research and Practice Int. Conf., Indian Institute of Technology, Roorkee, India.
Khatsuriya, R. M. (2005). Hydraulics of spillways and energy dissipators, Marcel Dekker, New York.
Pagliara, S., and Chiavaccini, P. (2006a). “Energy dissipation on block ramps.” J. Hydraul. Eng., 132(1), 41–48.
Pagliara, S., and Chiavaccini, P. (2006b). “Energy dissipation on reinforced block ramps.” J. Irrig. Drain. Eng., 132(3), 293–297.
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© 2010 ASCE.
History
Received: Jan 29, 2007
Accepted: Sep 30, 2009
Published online: Feb 12, 2010
Published in print: Mar 2010
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