A novel comprehensive correlation for discharge coefficient of square-edged concentric orifice plate at low Reynolds numbers

Ahmed, Essam Nabil; Ghanem, Alyaa Ashraf

doi:10.1016/j.flowmeasinst.2020.101751

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…STAR-CCM+ 11.0 software was used to simulate orifice discharge coefficient performance at low Reynolds numbers. Results showed a correlation between pressure distribution and flow structure through the orifice plate [11]. Simulation of turbulent flow through a circular orifice with square edges showed that increasing orifice plate thickness leads to an increase in the discharge coefficient with a fixed β ratio [12].…”

Section: Introductionmentioning

confidence: 92%

A Computational Fluid Dynamics Study on Characteristics of Flow Separation in Flow Rate Measurement Using Multi-Hole Plates

Babu,

Gowda,

Ranjith

2023

RAiSE-2023

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Section: Introductionmentioning

confidence: 92%

A Computational Fluid Dynamics Study on Characteristics of Flow Separation in Flow Rate Measurement Using Multi-Hole Plates

Babu,

Gowda,

Ranjith

2023

RAiSE-2023

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“…Abd et al [16] conducted experiments for various beta ratios and Reynolds numbers, the results showed that the Cd coefficient increases with an increase in β when Re ≤ 9000, whereas this coefficient decreases with an increase in β when Re > 9000. Ahmed and Ghanem [17] used a numerical technique to consider the impacts of modifying the placement of taps, the orifice thickness ratio, and the orifice/pipe diameter ratio throughout the ranges of 0.2 to 0.8. Almutairi et al [18] studied the flow through a multi-hole orifice meter with three different β ratios 0.55, 0.6, and 0.7, Reynold's number equaled 105, it was observed that an increase in the β ratio causes a decrease in pressure drop and an increase in discharge coefficient.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of flow through orifice-meter

Assran,

Ghaly,

Mohamed

2024

JES. Journal of Engineering Sciences

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Flow measurements in pipes and open channels are critical for successful water resource management as the economic value of water has increased. Orifice meters are typically used as flow-measuring devices in pipes because they are cheap and simple compared to other devices. Also, orifices are used as energy dissipation methods in water hammer protection devices and hydroelectric power tunnels. Although traditional circular orifice meters have been extensively studied, many points need to be studied. So, experimental and numerical research is carried out to study the effect of orifice geometry on energy loss and the discharge coefficient. The experimental tests are carried out using two different types of orifice plates: circular and triangular, for each one the cross-sectional area is changed four times. The orifice is installed on a 10 cm diameter transparent pipe. The flow rate is changed ten times for each orifice ranging from 13.8 to 49.2 m3/hr. A general correlation equation for the coefficient of discharge is deduced. It was found that the triangular orifice shapes are better than the circular orifice shapes in terms of performance, with reduced head loss and a larger discharge coefficient. By using computational fluid dynamics techniques, the flow behavior through the orifice is analyzed by ANSYS Fluent software. The numerical results confirmed the experimental ones where the pressure head loss for the triangular orifice is lower than the circular orifice and vena contracta is located at a distance equal to half the pipe diameter downstream of the orifice plate.

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“…They concluded that orifice diameter has a positive effect while Reynolds number inversely affects the value of discharge coefficient. Ahmed and Ghanem 13 investigated viscous, incompressible flow through square-edged concentric orifice plate and the performance of discharge coefficient consequent to variations of Reynolds number, orifice/pipe diameter ratio, and orifice thickness ratio, through a two-dimensional axisymmetric numerical model. They proposed correlation for discharge coefficient.…”

Section: Introductionmentioning

confidence: 99%

Correction and laboratory investigation for energy loss coefficient of square-edged orifice plate

Pengfei

2021

Science Progress

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A lot of studies have shown that the hydraulic characteristics of orifice plate are mainly controlled by its contraction ratio, but the thickness of square-edged orifice plate also has many impacts on energy loss characteristics. The primary objective of this study was to investigated the effects of square-edged orifice plate thickness on energy loss characteristics. In this paper, the effects of square-edged orifice plate thickness on energy loss characteristics are investigated by numerical simulation using CFD. Orifice plate discharge tunnel is axial symmetric, two dimensional numerical simulations of orifice plate discharge tunnel flow was used. The equation (9) for calculating energy loss coefficient of square-edged orifice plate energy dissipater considering the influence of thickness is proposed. The results of the present research demonstrate that energy loss coefficient decreases with increase of the orifice plate thickness. The results of model experiment are consistence with the results calculated by using rectified equation in present paper. The CFD simulations and Model experiment for the flow through an orifice plate are carried out. For square-edged orifice plate energy dissipater, the relative orifice plate thickness T/D has remarkable impacts on its energy loss coefficient ξ. The Traditional equation (8) is corrected by numerical results. The equation (9) for calculating energy loss coefficient of square-edged orifice plate energy dissipater considering the influence of thickness is proposed and this equation is available in the condition of d/D = 0.4–0.8, T/D = 0.05–0.25, and Re > 105(Re is Reynolds number). Comparing with the physical model experimental data, the relative errors of equation (9) is smaller than 15%.

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A novel comprehensive correlation for discharge coefficient of square-edged concentric orifice plate at low Reynolds numbers

Cited by 10 publications

References 9 publications

A Computational Fluid Dynamics Study on Characteristics of Flow Separation in Flow Rate Measurement Using Multi-Hole Plates

A Computational Fluid Dynamics Study on Characteristics of Flow Separation in Flow Rate Measurement Using Multi-Hole Plates

Characteristics of flow through orifice-meter

Correction and laboratory investigation for energy loss coefficient of square-edged orifice plate

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