Results 121 to 130 of about 1,034 (154)
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Flow Over Sharp‐Crested Plate Weirs
Journal of Irrigation and Drainage Engineering, 1987For flow past a two‐dimensional sharp‐crested weir located at the end of a horizontal rectangular channel, experimental results related to velocity and pressure distributions in the region of the nappe close to the weir crest section and the pressure distribution on the weir face were obtained.
Amruthur S. Ramamurthy +2 more
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Flow over rectangular sharp-crested weirs
Irrigation Science, 2009Sharp-crested weirs are the simplest form of over-flow spillway that commonly used to determine the flow rate in hydraulic laboratories, industry and irrigation systems, where highly accurate discharge measurements are needed. In this study, the experimental upper and lower nappe profiles in rectangular sharp-crested weirs are fitted by quadratic and ...
Sara Bagheri, Manouchehr Heidarpour
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Unsteady Stage-Discharge Relationships for Sharp-Crested Weirs
Journal of Irrigation and Drainage Engineering, 2020AbstractCurrently, discharges passing measurement devices and structures in unsteady flow conditions are determined based on relationships developed for steady flow condition due to lack of suffici...
Ghasemzadeh, Firouz +2 more
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Hydraulic Relations for Clinging Flow of Sharp-Crested Weir
Journal of Hydraulic Engineering, 2010Available 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 +3 more
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Sharp-crested weir located at the end of a circular channel
Proceedings of the Institution of Civil Engineers - Water Management, 2017Sharp-crested weirs are frequently used for discharge measurements in open channels. They offer a simple, reliable and accurate flow measurement approach if they are properly installed and maintained. Suppressed weirs can be installed in channels with different shapes. The standard suppressed rectangular weir is well documented in the literature.
Ali R. Vatankhah, Somayeh Khalili
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Experimental Investigation of Arched Sharp-Crested Weir Flow and Comparing it with Rectangular Weir
Iranian Journal of Science and Technology, Transactions of Civil Engineering, 2020The hydraulic behavior of the arched sharp-crested weirs is investigated and compared with rectangular weirs in this research. For this purpose, a laboratory study was made on a physical model, including weirs with four different arc lengths each with five different heights.
Khadijeh Mirzaei, Hamid Reza Sheibani
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The calibration of sharp crested weirs by the pondage drawdown method
Journal of Hydrology, 1977Abstract The paper outlines the problems of calibrating flow measuring structures by conventional techniques. The principle of the pondage drawdown method of calibration is described and the accuracy of the method determined by application to a 90° V notch sharp crested weir.
F.A. Johnson, C.S. Green
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FLOW OVER INCLINED SHARP CRESTED TRIANGULAR WEIR
ISH Journal of Hydraulic Engineering, 2003ABSTRACT In the field of Hydraulic Engineering, Irrigation Engineering and Chemical Engineering the weirs and notches find their use as a device for discharge measurement and flow control. The plane of these weirs/notches has been standardized to be normal to the flow axis both ways.
M. N. Shesha Prakash, A. V. Shivapur
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Flow measurement using circular sharp-crested weirs
Flow Measurement and Instrumentation, 2010Abstract Circular sharp-crested weirs are used as a flow-measuring device in open channels, reservoirs or tanks. The theoretical discharge equation of a circular thin weir ends up the complete elliptic integrals of the first and second kinds that are not very suitable for practical purposes due to their complexity. No simple and accurate equation
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Head-Discharge Equation for Sharp-Crested Polynomial Weir
Journal of Irrigation and Drainage Engineering, 2008Polynomial weirs can be applied in agricultural and municipal engineering to produce a wide range of head-discharge behavior, including the proportional (linear) characteristics of the Sutro weir. This note describes a method to determine the head-discharge equations of sharp-crested weirs with openings defined by polynomials of any order n .
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