Systematic investigation of flow profiles in pipes and their effects on gas meter behaviour

Mickan, Bodo; Wendt, G.; Kramer, Rainer; Dopheide, D.

doi:10.1016/s0263-2241(97)00053-5

Cited by 15 publications

(17 citation statements)

References 13 publications

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“…Table 2 presents the results for the correction factor obtained by numerical integration of the empirical velocity profile of Nikuradse [25] [Eqs. (10), (12)] and the velocity profile obtained in the present study by numerical simulation.…”

Section: The Numerical Integration For the Correction Factormentioning

confidence: 76%

“…The scientific and technological community has been evaluating flow disturbance patterns and their consequences to flow measurement as well as methods to diminish errors and uncertainties. Several flow patterns downstream from typical pipe installation have been identified by Mickan et al [12]. The authors use Laser Doppler Anemometry (LDA) to recover complete information on the velocity components of disturbed profiles.…”

Section: Introductionmentioning

confidence: 99%

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On the effect of the mounting angle on single-path transit-time ultrasonic flow measurement of flare gas: a numerical analysis

Martins

Andrade

Ramos

2019

J Braz. Soc. Mech. Sci. Eng.

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The oil and gas industry needs accurate flow measurement since it is required by law, and so, considered as a field of legal metrology. Nevertheless, curves and other commonly found obstacles may affect the quality of flow measurements, due to disturbances to the flow, such as swirl and asymmetries in the velocity profile. Single-path ultrasonic flow meters are often used to measure the flow rate in flare gas installations, even though they are sensitive to such disturbances. The present paper uses numerical tools to obtain disturbed flow fields downstream from single-and double-elbow pipe installations, aiming to investigate the effects of the mounting angle on disturbed ultrasonic flow measurements, taking into consideration the contributions of all velocity components. Several transducer mounting angles from 0° to 180° are assessed varying the Reynolds numbers (based on the pipe diameter D) from 10 4 to 2 × 10 6 and axial positions up to 80D downstream from the curve. Results indicate that the correction factors for installation effects are mostly greater than in the guidelines and regulations, which suggests that, in real situations, the flow rate is being underestimated. Moreover, badly located measuring installations may be upgraded just by changing the mounting angle of the ultrasonic transducers.

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Section: The Numerical Integration For the Correction Factormentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

On the effect of the mounting angle on single-path transit-time ultrasonic flow measurement of flare gas: a numerical analysis

Martins

Andrade

Ramos

2019

J Braz. Soc. Mech. Sci. Eng.

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“…A simple way is choosing both w 1 and w 2 as 0. 5.v re f is the reference (true) mean cross-sectional flow velocity, which can be extracted directly from the CFD simulation results. The results are shown in TABLE II and demonstrate clearly that the performances with the transverse angle of 90°are in general closer to the reference flow velocity than the transverse angle of 0°.…”

Section: A Cfd Simulation Resultsmentioning

confidence: 99%

“…Given the sound path position, the upstream straight pipe length and the meter transverse angle, the flow field under different flow velocities are simulated and the related K -factors of the meter are calculated according to equation (4). Then the standard derivation of K -factor can be calculated according to (5) and (6) [19].K…”

Section: B Optimal Sound Path Position Of Square-shaped Ultrasonic Fmentioning

confidence: 99%

“…The performance of multi-path ultrasonic flowmeter with a circular pipe geometry under a complex flow with strong asymmetric and swirling velocity profiles have been investigated by experiments [4], [5], theoretical analyses [6]- [8], and computer simulations [9], [10]. Compared to the ultrasonic flowmeter with circular pipe geometry, the ultrasonic flowmeter with square-shaped duct or even triangular duct is not common but has caught attention [11]- [15].…”

Section: Introductionmentioning

confidence: 99%

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CFD-Aided Investigation of Sound Path Position and Orientation for a Dual-Path Ultrasonic Flowmeter With Square Pipe

Zhao

Peng

Takahashi³

et al. 2015

IEEE Sensors J.

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This paper discusses the issues with a dual-path ultrasonic flowmeter with square-shaped pipe using CFD simulations, which include the sound path position, installation orientation, and effect of straight pipe length on the performance of the meter. By analyzing the flow field inside a single-elbow pipeline and T-shaped pipeline, the correction factor for the dual-path square-shaped ultrasonic flowmeter with respect to the change of Reynolds number is calculated. The optimal sound path position and orientation are investigated. Simulation results indicate that the optimal sound path position is located at the position of 0.65 times the half side length of square pipe crosssection. The upstream straight pipe length requirements for a single-elbow pipeline and a T-shaped pipeline are determined, which are at least 20-D and 50-D, respectively. Preliminary experiments are carried out and validate the simulations. The results are helpful for the design and practical applications of square-shaped ultrasonic flowmeter.Index Terms-Ultrasonic flowmeter, CFD, square-shaped pipe, sound path, flow profile.

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Optimizing turbine meter performance through geometrical parameter analysis: A simulation-based approach using TOPSIS

Neyshaburi,

Khoshnevis,

Deymi-Dashtebayaz

2024

Flow Measurement and Instrumentation

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Systematic investigation of flow profiles in pipes and their effects on gas meter behaviour

Cited by 15 publications

References 13 publications

On the effect of the mounting angle on single-path transit-time ultrasonic flow measurement of flare gas: a numerical analysis

On the effect of the mounting angle on single-path transit-time ultrasonic flow measurement of flare gas: a numerical analysis

CFD-Aided Investigation of Sound Path Position and Orientation for a Dual-Path Ultrasonic Flowmeter With Square Pipe

Optimizing turbine meter performance through geometrical parameter analysis: A simulation-based approach using TOPSIS

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