A numerical and experimental analysis of multi-hole orifice in turbulent flow

Golijanek-Jędrzejczyk, Anna; Mrowiec, Andrzej; Kleszcz, Sławosz; Hanus, Robert; Zych, Marcin; Jaszczur, Marek

doi:10.1016/j.measurement.2022.110910

Cited by 17 publications

(6 citation statements)

References 16 publications

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“…Model k – ω BSL has been selected to conduct numerical flow tests in the work 25 where validation from several turbulent models for similar flow conditions was performed. The adopted model k – ω BSL, allows for using the benefits of the known calculation model k – ω in internal area of the boundary layer, whereas in the external part modelling is performed in model k – ε which, excluding boundary layer, does a much better job.…”

Section: Methodsmentioning

confidence: 99%

Measurements of the flow of a liquid–solid mixture/suspension through a segmented orifice

Heronimczak,

Mrowiec,

Rząsa

et al. 2024

Sci Rep

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The paper attempts to solve the metrological problem that occurs when measuring the intensity of a flowing fluid with suspended solids with densities greater and less than the density of the fluid. The issue of the possibility of self-cleaning of a prototype variant of a segmented orifice from floating solid particles forming mixture/suspensions is discussed. For spherical particles of solids calculations have been made to allow for determining a borderline between their floating and entrainment by the flow, based on dimensionless numbers: Archimedes number and Reynolds number. Experimental tests and CFD simulations were conducted with a variable flow determined by Reynolds number for comparable segmental orifices with orifice module m = 0.102. Flow characteristics were plotted. Based on the results obtained from numerical simulations, positive influence of the inclination of skew segmental orifice downflow plane was presented. The results obtained from the study are a guideline for planning further studies to expand the knowledge of segmented orifices with inclined inflow plane.

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Section: Methodsmentioning

confidence: 99%

Measurements of the flow of a liquid–solid mixture/suspension through a segmented orifice

Heronimczak,

Mrowiec,

Rząsa

et al. 2024

Sci Rep

Self Cite

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“…As shown in Equation (2), the frequency of oscillations depends on the density of the measured fluid. Similar to differential pressure flowmeter types [ 27 , 28 , 29 , 30 , 31 ], without knowing the fluid density no measurement can be carried out. This contrasts with vortex or ultrasonic flowmeters.…”

Section: Methodsmentioning

confidence: 99%

CFD Model of a Mechanical Oscillator Flowmeter

Szudarek

Turkowski

Piechna

2022

Sensors

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Most of the studies on mechanical oscillator flowmeters were conducted in the ‘80s and ‘90s when computational fluid dynamics (CFD) was not a viable scientific tool in flow metrology. Still, many topics related to the application of mechanical oscillator flowmeters require further investigation. In the article, a numerical model of a mechanical oscillator flowmeter is developed with the commercial software ANSYS Fluent. The model is validated against experimental data obtained at a water calibration stand. The influence of the selected turbulence model, dynamic mesh method, as well as grid and time step size is studied. The model’s qualitative behavior is correct, allowing investigation into the flowmeter operation in detail. It can provide a base for the improvement of the flowmeter’s performance. Relative differences in the frequency of oscillations did not exceed 4% for a DN50 flowmeter in the flow rate range (2–40) m3/h.

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“…In such orifices, a single hole is replaced by several holes. Orifice solutions in which a single circular hole has been replaced by a single hole in the shape of a square, triangle, oval are also encountered in several studies [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Differential Flowmeter: Standard Orifice and Slotted Orifices

Tomaszewska-Wach

2023

Energies

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The paper presents the results of simulation studies of fluid flow through a standard orifice and two slotted orifices. The research that has been carried out concerns the analysis of the effect of the orifice geometry on the velocity profiles, turbulence kinetic energy and turbulence energy dispersion. The profile studies were conducted at different distances behind the orifice so that the results could be compared with each other. The studied flow included an airflow whose inlet velocity was 15 m/s. The turbulence model k-ε was used for numerical calculations. The tested orifices were characterized by an orifice constriction equal to β = 0.5. The calculations involved flow through a pipeline with a diameter of 160 mm. The results show that for a standard orifice, the maximum velocity of the flow is about 95 m/s and this is recorded at a distance of about 10–20 cm behind the orifice, and then it decreases, and at a distance of about 60 cm, the flow velocity is about 27 m/s. In the case of slotted holes, the maximum velocity is about 30% lower compared to the flow rate through a standard orifice design. The maximum velocity behind slotted orifices occurs directly behind the orifice, and in the cases of slotted orifice 1 and slotted orifice 2, was about 70 m/s and 67 m/s, respectively. For slotted orifice 1, at a distance of 20 cm behind the orifice, the flow assumed a velocity of about 19 m/s, whereas for slotted orifice 2, the flow reached a speed of about 18 m/s, at a distance of about 30 cm behind the orifice. The values of the maximum kinetic energy of turbulence for the tested orifices are about 420 m2/s2 for the standard orifice, and about 250 m2/s2 and 220 m2/s2 for slotted orifices 1 and 2, respectively. The obtained simulation results demonstrated that slotted orifices lead to faster stream homogenization and do not disturb the flow as much as a standard orifice. Slotted orifices exhibit a higher flow coefficient.

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A numerical and experimental analysis of multi-hole orifice in turbulent flow

Cited by 17 publications

References 16 publications

Measurements of the flow of a liquid–solid mixture/suspension through a segmented orifice

Measurements of the flow of a liquid–solid mixture/suspension through a segmented orifice

CFD Model of a Mechanical Oscillator Flowmeter

Numerical Analysis of the Differential Flowmeter: Standard Orifice and Slotted Orifices

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