Flow measurement using a triangular broad crested weir theory and experimental validation

Achour, Bachir; Amara, Lyes

doi:10.1016/j.flowmeasinst.2021.102088

Cited by 10 publications

(11 citation statements)

References 8 publications

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“…A sharp crested triangular weir was recently studied based on two theoretical models, a weir theory (Model I) and critical flow approach (Model II) [7]. Flow measurement using a triangular broad crested weir theory and experimental validation studied recently [8]. Theorical approach studied based on the application of dimensionless energy equation applied between a section taken in the approach channel and the weir under critical flow conditions [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…Flow measurement using a triangular broad crested weir theory and experimental validation studied recently [8]. Theorical approach studied based on the application of dimensionless energy equation applied between a section taken in the approach channel and the weir under critical flow conditions [9,10]. Leeungculsatien and Lucas [11] designed an electromagnetic flow meter.…”

Section: Introductionmentioning

confidence: 99%

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Designing a device for measuring the velocity of liquid flowing in open channels

Mutlu

Kaygusuz

2023

Turkish Journal of Engineering

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Practical problems like measurement, control and linearization of mechanical outputs can be solved within the context of function generation problem. In this work, an exemplary application associated with the measurement of water velocities in open channels has been shown, and the resulting apparatus has been constructed and tested under laboratory conditions. To test its performance, velocities, have been compared with those obtained by the constructed prototype. The results have been observed to be consistent with each other.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Designing a device for measuring the velocity of liquid flowing in open channels

Mutlu

Kaygusuz

2023

Turkish Journal of Engineering

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“…To this aim, the concepts of vena contracta [19] and the measured discharge coefficient C d , less than the unit, are used [20]. Many authors [3,21,22] studied the discharge coefficient, which includes all the effects neglected in the derivation (viscosity, surface tension, velocity head in the approach channel, flow turbulence, non-uniform velocity profile, and streamline curvature due to weir contraction) of the stage-discharge equation.…”

Section: Introductionmentioning

confidence: 99%

“…Lately, Achour and Amara [21] investigated a triangular broad-crested weir with p = 0 with a self-cleaning and semi-modular hydraulic behavior. The primary objective of their investigation was theoretically deriving the Q-h equation and C d considering the influence of the approach flow velocity.…”

Section: Introductionmentioning

confidence: 99%

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New Stage–Discharge Relationship for Triangular Broad-Crested Weirs

Nicosia

Carollo

Stefano

et al. 2022

Water

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Simple hydraulic structures, such as weirs, allow measuring flow discharge by using the upstream flow depth and a stage–discharge relationship. In this relationship, a discharge coefficient is introduced to correct all the effects neglected in the derivation (viscosity, surface tension, velocity head in the approach channel, flow turbulence, non-uniform velocity profile, and streamline curvature due to weir contraction). In this paper, the dimensional analysis and the incomplete self-similarity theory are used to investigate the outflow process of triangular broad-crested weirs, characterized by different values of the ratio between crest height p and channel width B, and to theoretically deduce a new stage–discharge relationship. A new theoretical stage–discharge relationship is suggested for the free-flow condition, and it is tested using experimental data available in the literature for the hydraulic condition p/B > 0. The obtained stage–discharge equation, characterized by low errors in discharge estimate, is useful for laboratory and field investigations. Finally, specific analysis for the triangular broad-crested weirs with p/B > 0 was developed to modify the stage–discharge relationship obtained for the case p/B = 0. This specific stage–discharge relationship allows to reduce the errors, which are generally less than ±5%, in the estimate of discharge for triangular broad-crested weirs with p/B > 0 and is also applicable for the case p/B = 0.

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Discharge coefficient prediction and sensitivity analysis for triangular broad‐crested weir using machine learning methods

Shen,

Cao,

Parsaie

2024

River

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The broad‐crested weir is convenient to construct and has a small amount of excavation, widely used in practical engineering. Discharge computing has been the focus of research on this structure, thus developing generalized regression neural network (GRNN), genetic programming (GP), and extreme learning machine (ELM) are used to predict the discharge coefficient (Cd) of the triangular broad‐crested weir. The comprehensive analysis shows that the ELM model has high stability, predictive ability, and computational speed. The coefficient of determination (R^2) is 0.99982, the mean absolute percentage error (MAPE) is 0.000261, the Nash‐Sutcliffe coefficient (NSE) is 0.99977, and the root means square error (RMSE) is 4.17E‐05 in the testing phase. The apex angle θ is the most critical parameter affecting the Cd, and the contribution to the Cd is 52.45%. A new computational formula is proposed and compared with the accuracy of empirical formulas, showing that the intelligent method has higher accuracy and efficiency.

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Flow measurement using a triangular broad crested weir theory and experimental validation

Cited by 10 publications

References 8 publications

Designing a device for measuring the velocity of liquid flowing in open channels

Designing a device for measuring the velocity of liquid flowing in open channels

New Stage–Discharge Relationship for Triangular Broad-Crested Weirs

Discharge coefficient prediction and sensitivity analysis for triangular broad‐crested weir using machine learning methods

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