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Effect of upstream crest length on flow characteristics and
discharge capacity of triangular labyrinth side weirs
Nihat Kaya
Civil Engineering Department, Faculty of Engineering, Firat
University, 23119, Elazig, Turkey.
E-mail:
nkaya@firat.edu.tr.
Accepted 3 June, 2010 |
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A series of laboratory experiments were performed within
this study in order to investigate the hydraulic
characteristics and the discharge capacity of sharp-crested
triangular labyrinth side weirs with various upstream crest
lengths. To conduct the experiment series, twenty seven
different labyrinth side weir models having triangular plan
view that are manufactured from steel were tested in the
laboratory flume. A labyrinth weir is an overflow weir that
is folded in plan view to provide a longer total effective
length for a given overall weir width. To estimate the
outflow over a side
weir, the discharge coefficient in the side weir equation
needs to be determined. A comprehensive laboratory study
including 679 tests was conducted to determine the discharge
coefficient of the side weirs. It was found that the
discharge coefficient of triangular labyrinth side weirs was
higher than that of classical side weirs. In addition,
reliable equations to calculate the discharge coefficient of
side weirs are presented.
Key words:
Side weir, discharge coefficient, labyrinth weir, hydraulic
structure, open channel flow. |
