Flow hydrodynamics near inlet key of Piano Key Weir (PKW)
نویسندگان
چکیده
منابع مشابه
Experimental study of Hydraulic Flow of Circular Piano-Key Inlet in Shaft Spillways
One of the most important conflicts that shaft spillways have to deal with is vortex formation. This phenomenon leads to some unfavorable effects such as vibration in the body of structures, air entrainment and reduced overflow capacity of the spillway. Among all solutions for disrupted vortex formation, an innovative one called circular piano-key spillway, based upon piano key weir principles ...
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 کاملEstimation of A-type Piano Key weir rating curve
The Piano Key weir (PKW) is a hydraulically attractive alternative to linear overflow weirs, increasing the unit discharge for similar heads and spillway widths. This advantage allows operating dam reservoirs on an increased level and provides thereby an enhanced retention volume. It is a result of the non-linear nature of PKWs being folded back and forth to make repeating cycles or keys. As PK...
متن کاملOverview of Piano Key weir prototypes and scientific model investigations
The interest in Piano Key weirs (PKW) was increasing over the past years, both in terms of application and hydraulic research. Several systematic model test series were performed and published so far, originating from different hydraulic laboratories around the world. Therein, the key geometric parameters dominating the hydraulic capacity of PKWs were identified as developed crest length, trans...
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...
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ژورنال
عنوان ژورنال: Sadhana
سال: 2015
ISSN: 0256-2499,0973-7677
DOI: 10.1007/s12046-015-0423-1