Determination of Discharge Coefficient for Sharp-edged Rectangular with Curvature Weirs Experimentally

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Rajabi Ahangary, Mehdi | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44225 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Borgheei, Sayyed Mahd; Abrishamchi, Ahmad
Abstract:
Sharp crested weirs are one of the main and oldest means of measuring discharge in water conveyance systems. Many studies have been done on sharp rectangular weirs and have provided many relationships regarding the effect of geometric parameters and various factors on discharge coefficient of the weirs.In some places, due to existence of obstacles or barriers in the channel, it is impossible to create a symmetrical continuous weir some other cases, multiple or asymmetric or curved weirs should be used, which is the main concept of this project. Since it seems unlikely that a purely mathematical model can review the impact of the multiplicity and asymmetry of these weirs without using empirical coefficients, the main objective of this research is to study discharge coefficient of asymmetric rectangular weirs using experimental model. In this research, various crested rectangular and curved weirs were placed across the channel in different positions in different cases and the discharge coefficient for these weirs were obtained with the measurement of the height of water and discharge over the weir. Finally effects of number, curvuture and symmetrisity of these weirs were studied
Keywords:
Experimental Model ; Multi Weir ; Rectangular Weir ; Curved Weir ; Symmetric Weir

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