Abstract
This paper aims to conduct a series of laboratory experiments in case of steady-state flow for the new size 7 ̋ throat width (not presented before) of the cutthroat flume. For this size, five different lengths were adopted 0.535, 0.46, 0.40, 0.325 and 0.27m these lengths were adopted based on the limitations of the available flume. The experimental program has been followed to investigate the hydraulic characteristic and introducing the calibrated formula for free flow application within the discharge ranged between 0.006 and 0.025 m3/s. The calibration result showed that, under suitable operation conditions, the suggested empirical formulas can accurately predict the values of discharge within an error ± 3%.
Highlights
Increasing of demands for improving the water management technologies worldwide, leads to the increase need for water measurement structure of low cost with high accurate
The use of a consistent geometric shape has facilitated the development of a general free flow discharge equation for rectangular Cutthroat flumes by Skogerboe.[2]
The first and the third ratio are standard as recommended in literature, whereas the others are new it adopted based on present study.The aim is to calibrate new empirical formulas for discharge of free flow conditions.The measurements in this study were done using the point gauge
Summary
Increasing of demands for improving the water management technologies worldwide, leads to the increase need for water measurement structure of low cost with high accurate. The use of a consistent geometric shape has facilitated the development of a general free flow discharge equation for rectangular Cutthroat flumes by Skogerboe.[2]. This flume is characterized by changing the water surface profile dramatically after the section of the throat as compared with flow into the converging section, where at which the surface of the water. The formula of discharge is take the following fom; This form of Equation has been firstly presented by Skogerboe [1], where Cf and nf are the coefficient and exponent for the free flow conditions, respectively. The first and the third ratio are standard as recommended in literature, whereas the others are new it adopted based on present study.The aim is to calibrate new empirical formulas for discharge of free flow conditions.The measurements in this study were done using the point gauge
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