Upstream Erosion and Sediment Passage at Piano Key Weirs
نویسندگان
چکیده
منابع مشابه
From Labyrinth to Piano Key Weirs – A historical review
Free crest spillways are hydraulically efficient and safe in operation. Since their discharge capacity is directly proportional to the crest length several types have been developed with the purpose to increase the length of the latter. Among these types traditional labyrinth weir spillways have been studied and used for a long time. Their hydraulic performance and the effect of the involved ge...
متن کاملHydraulic design of A-type Piano Key Weirs
Piano Key Weirs (PKWs) are an alternative to linear overflow structures, increasing the unit discharge for similar heads and spillway widths. Thus, they allow to operate reservoirs with elevated supply levels, thereby providing additional storage volume. As they are relatively novel structures, few design criteria are available. Hence, physical model tests of prototypes are required. This study...
متن کاملComparison of Hydraulic Performance of Linear and Nonlinear Piano-Key Weirs in Plan
In this research, by using FLOW3D, the performance of non-linear (arced) piano key (PKW-NL) in plan and linear piano key weir (PKW-L), with equal length of weir, was compared. Results showed that nonlinearity of the weir caused 20% increase in the discharge coefficient. Investigating the velocity contours for these two weir models also showed that maximum velocity within the PKW-NL weir structu...
متن کاملComparing the Behavior Hydrodynamics Flow Over of Type A, B, and C Piano Key Weirs
The piano key weir (PKW) is a new type of hydraulic structure that has been of great interest to designers in recent years. In the present study, steady flow on the types A, B, and C PKWs was studied numerically using the FLOW-3D numerical model. Upon software validation using the experimental data, the 3D flow pattern on the types A, B, and C PKWs was studied, and along with the evaluation of ...
متن کاملNumerical Analysis of Flow Hydraulic in Trapezoidal Labyrinths and Piano Key Weirs
The flow fields over a trapezoidal labyrinth weir (two-cycle) and a piano key weir were simulated using Flow3D, studying the impact of each model on the flow field in the weirs and the coefficient of discharge in comparison with the available experimental data. Moreover, the models were investigated experimentally in a 12.5 m long, 0.3 m wide, and 0.4 m high rectangular flume under clear-water ...
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ژورنال
عنوان ژورنال: Journal of Hydraulic Engineering
سال: 2019
ISSN: 0733-9429,1943-7900
DOI: 10.1061/(asce)hy.1943-7900.0001616