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Triangular labyrinth side weirs with one and two cycles
, Article Proceedings of the Institution of Civil Engineers: Water Management ; Volume 166, Issue 1 , 2013 , Pages 27-42 ; 17417589 (ISSN) ; Nekooie, M. A ; Sadeghian, H ; Ghazizadeh, M. R. J ; Sharif University of Technology
2013
Abstract
Labyrinth side weirs provide a potentially effective way to shorten the length of a channel opening with the desired water height, but the discharge coefficient needs to be found experimentally. Experiments were carried out for triangular labyrinth side weirs with one and two cycles in order to obtain the discharge coefficient. The test variables included channel opening, head angle, number of cycles, weir height, upstream water depth and discharge in a subcritical situation. The resultsshow that the discharge coefficient ratio for a triangular labyrinth to a conventional side weir could rise to more than 2 with the same flow and geometric conditions. Relationships for the De Marchi...
Discharge characteristics of a modified oblique side weir in subcritical flow
, Article Flow Measurement and Instrumentation ; Volume 22, Issue 5 , October , 2011 , Pages 370-376 ; 09555986 (ISSN) ; Parvaneh, A ; Sharif University of Technology
2011
Abstract
Side weirs are frequently used in many water projects. Due to their position with respect to the flow direction, side weirs are categorized as plain, oblique and labyrinth. One of the advantages of an oblique side weir is the increase in the effective length of the weir for overflowing and, therefore, diverting more discharge with the same channel opening, weir height and flow properties (i.e., upstream discharge, upstream Froude number and so on). In this paper, an experimental set-up of a new design of an oblique side weir with asymmetric geometry has been studied. The hydraulic behavior of this kind of oblique side weir, with a constant opening length, different weir heights and...