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Discharge Coefficient of Oblique Labyrinth Side Weir

Author(s): A. Kabiri-Samani; A. Parvaneh; M. A. Nekooie

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Abstract: Labyrinth side weir is one type of weirs, which can be used when the length of opening is limited. One of the advantages of labyrinth side weir is to increase the effective length of weir perpendicular to the flow and, therefore, diverting more discharge with the same flow depth and weir geometry (opening and height). Discharge coefficient should be determined to investigate the weir performance and estimate the discharge passing over the weir. In this paper, hydraulic performance of labyrinth side weir with asymmetric geometry has been experimentally studied. The change to the geometry of ordinary labyrinth side weirs causes an increase in the effectiveness of the length of weir as being more in line with the streamlines. Thus, hydraulic behavior of this kind of labyrinth side weir with a constant opening length and different heights and angle has been investigated. The results show that this kind of weir is 17.8%more efficient than the ordinary labyrinth side weir and up to 35.3%more efficient respect to conventional rectangular side weir in a rectangular channel. Finally, the discharge coefficient as a function of geometrical and flow variables are presented.

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Year: 2016

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