Results 141 to 150 of about 435 (189)

Weir velocity formulation for sharp-crested rectangular weirs

Flow Measurement and Instrumentation, 2015
Abstract Discharge in open channels can be measured by sharp-crested rectangular weirs. Generally, measured head over the weir crest is substituted into an empirical formula derived from energy considerations to calculate the discharge. Assumptions made on the derivation are taken into account by defining a discharge coefficient that fits into the ...
A Burcu Altan-Sakarya
exaly   +3 more sources

Discharge formula for rectangular sharp-crested weirs

Flow Measurement and Instrumentation, 2011
Abstract Sharp-crested rectangular weirs used for discharge measurement in channels and laboratories are experimentally investigated. Height and width of weir plate are the two parameters characterizing the head-discharge relationship. Laboratory experiments are conducted by measuring the discharge and the head over the weir for variable weir heights
Ismail Aydin, A Burcu Altan-Sakarya
exaly   +3 more sources

The effect of sharp-crested weir shape on air entrainment

Canadian Journal of Civil Engineering, 2002
Aeration in the waters of rivers and streams is very important to the quality and existence of aquatic life. If the overfall jets downstream of weir structures plunges into a plunge pool, entrained air bubbles will contribute to aeration. This paper investigates sharp-crested weirs having different cross-sectional geometry and their effect on the air ...
Ahmet Baylar, M Emin Emiroglu
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Numerical simulation of sharp-crested weir flows

Canadian Journal of Civil Engineering, 2009
The sharp-crested weir in a rectangular open channel can be used as a simple and accurate device for flow measurement and control in open channels. However, in the past, the solution to this problem was found mainly on the basis of experimental data or through the development of simplified theoretical expressions.
J. Qu, A.S. Ramamurthy, R. Tadayon, Z. Chen   +3 more
exaly   +2 more sources

Design and Calibration of a Compound Sharp-Crested Weir

Journal of Hydraulic Engineering, 2005
This paper describes the design and calibration of a compound sharp-crested weir consisting of two triangular parts with different notch angles. This weir provides accurate measurement for a wide range of flows without discontinuities. The lower triangular part of the weir handles the normal range of discharges at the measurement structure while the ...
Juan Reca
exaly   +2 more sources

Hydraulic Relations for Clinging Flow of Sharp-Crested Weir

Journal of Hydraulic Engineering, 2010
Available discharge coefficient formulas for sharp-crested weirs are only applicable to the free-flow regime. To extend the range of discharge measurement by a rectangular sharp-crested weir, critical heads of the transition flow regime, the head-discharge relation for clinging and free flow, and the discharge coefficient for clinging flow were ...
Xin Zhang, Linjuan Yuan, Ruwu Peng, Zhang Chen   +3 more
exaly   +2 more sources