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Experimental investigation on sharp-crested rectangular weirs
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Date
2012
Author
Gharahjeh, Siamak
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This study is an experimental research to formulate the discharge over sharp-crested rectangular weirs. Firstly, a series of measurements on different weir heights were conducted to find the minimum weir height for which channel bed friction has no effect on discharge capacity. After determining the appropriate weir height, weir width was reduced to collect data on discharge-water head over weir relationship for a variety of different weir openings. Then, the data was analyzed through regression analysis along with utilization of global optimization technique to reach the desired formulation for the discharge. By taking advantage of a newly-introduced “weir velocity” concept, a simple function was eventually detected for the discharge where no discharge coefficient was involved. The behavior of the weir velocity function obtained in the present study illustrates the transition between the fully contracted and partially contracted weirs. In addition, the proposed weir velocity formulation is simple and robust to calculate the discharge for full range of weir widths.
Subject Keywords
Weirs.
,
Open-channel flow.
,
Flow meters.
URI
http://etd.lib.metu.edu.tr/upload/12614379/index.pdf
https://hdl.handle.net/11511/21670
Collections
Graduate School of Natural and Applied Sciences, Thesis
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S. Gharahjeh, “Experimental investigation on sharp-crested rectangular weirs,” M.S. - Master of Science, Middle East Technical University, 2012.
