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Practical constant-accuracy linear weir

Murthy, Keshava K and Prakash, Shesha MN (1994) Practical constant-accuracy linear weir. In: Journal of Irrigation and Drainage Engineering, 120 (3). 550 -562 .

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This paper is concerned with the modifications of the Extended Bellmouth Weir (EBM weir) earlier designed by Keshava Murthy. It is shown that by providing inclined sides (equivalent to providing an inward-trapezoidal weir) over a sector of a circle of radius R, separated by a distance 2t, and depth d, the measurable range of EBM can be considerably enhanced (over 375%). Simultaneously, the other parameters of the weir are optimized such that the reference plane of the weir coincides with its crest making it a constant-accuracy linear weir. Discharge through the aforementioned weir is proportional to the depths of flow measured above the crest of the weir for all heads in the range of 0.5R less-than-or-equal-to h less-than-or-equal-to 7.9R, within a maximum deviation of +/-1% from the theoretical discharge. Experiments with two typical weirs show excellent agreement with the theory by giving a constant-average coefficient of discharge of 0.619

Item Type: Journal Article
Publication: Journal of Irrigation and Drainage Engineering
Publisher: American society of civil engineers
Additional Information: Copyright of this article belongs to American society of civil engineers.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 11 Apr 2011 07:05
Last Modified: 11 Apr 2011 07:05
URI: http://eprints.iisc.ac.in/id/eprint/36698

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