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Reading: An Experimental Investigation of Head loss through Trash Racks in Conveyance Systems

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Section I

An Experimental Investigation of Head loss through Trash Racks in Conveyance Systems

Authors:

N. R. Josiah ,

University of Peradeniya, LK
About N. R.

Temporary Instructor, Department of Civil Engineering

B.Sc. Eng. (Hons.) (Peradeniya)

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H. P. S. Tissera,

HaylesNeluwa Hydropower (Pvt) Ltd., LK
About H. P. S.

Civil Engineer

B.Sc. Eng. (Hons.) (Peradeniya)

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K. P. P. Pathirana

University of Peradeniya, LK
About K. P. P.

Professor of Civil Engineering, Department of Civil Engineering,

Eng. (Prof.), B.Sc. Eng. (Hons.) (Peradeniya), M.Eng., Ph.D. (KULeuven)., C.Eng., FIE(Sri Lanka), MICE(London),Int.PE,

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Abstract

Trash racks are widely used in the water conveyance systems to prevent trappings of floating and submerged debris that would cause operational problems at downstream reaches. Head loss through the trash rack is one of the key parameters in designing trash racks. The trash racks commonly used in Sri Lanka are with circular bars. The existing methods to estimate head loss through these trash racks give very wide results which make it difficult for engineers to produce reliable designs for water conveyance systems. In order to investigate this problem in detail and to develop a methodology to estimate head loss through trash racks a set of experiments was performed in open channel with trash racks by considering the variable parameters such as bar diameter, clear spacing, inclination angle and unit discharge. In this study, a new head loss equation is proposed based on the experimental findings to estimate the head loss through trash racks made up of circular bars.

 

How to Cite: Josiah, N.R., Tissera, H.P.S. & Pathirana, K.P.P., (2016). An Experimental Investigation of Head loss through Trash Racks in Conveyance Systems. Engineer: Journal of the Institution of Engineers, Sri Lanka. 49(1), pp.1–8. DOI: http://doi.org/10.4038/engineer.v49i1.6913
Published on 21 Jan 2016.
Peer Reviewed

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