Calculation of geometric flow profile correction factor for ultrasonic flow meter using semi-3D simulation technique

Mousavi, Seyed Foad; Hashemabadi, Seyed Hassan; Jamali, Jalil

doi:10.1016/j.ultras.2020.106165

Cited by 28 publications

(9 citation statements)

References 28 publications

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“…Modules for an multipath ultrasonic gas flowmeter, including the acoustic path arrangement, ultrasound emission and reception module, transit-time measurement module, and software, were designed by Chen et al 15 The effects of ultrasonic noise generated by pressure control valves on ultrasonic gas flowmeters were investigated by Kang et al 16 To consider the effects of a non-uniform flow profile, a semi-3D simulation technique was used, and the flow profile correction factor for a commercial ultrasonic meter was calculated with reasonable accuracy for different inlet flow velocities. 17 The inherent error of an ultrasonic flowmeter with non-ideal hydrogen gas flow was researched by Chen and Wu. 18 They used CFD to simulate hydrogen flows downstream from a single right bend and an orifice plate at different Reynolds numbers.…”

Section: Introductionmentioning

confidence: 99%

Study on flow field and measurement characteristics of a small-bore ultrasonic gas flow meter

Chen

Cao

Cui

2021

Measurement and Control

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A new structure is proposed for a DN25-type ultrasonic gas flow meter with a V-shape double sound channel arrangement. The flow field characteristics are analyzed including velocity curves for the four channel lines, velocity profiles for different cross-sections of the flow meter, and streamlines of the transducer channel sections. The metering characteristics of the flowmeter are measured using a Venturi nozzle device. When the pipeline flow rate is less than 2.26 m/s, the pipe installation does not have a significant effect on the velocity profile and the velocity in the channel lines. However, the error in the low-flow region is large, and the flow distortion directly affects the measurement accuracy. When an ultrasonic gas flow meter with an accuracy class of 1.5 is used with pipes containing a single or double bend upstream, the linear error doubles, low-flow error becomes a negative deviation, and reference error in the low-flow region becomes approximately 700%–949%. The installation structure of the first pair of transducers also affects the signal propagation of the transducers behind it. Therefore, it is critical to process the ultrasonic signal according to the flow field distribution and adopt different weighted algorithms to obtain accurate pipeline flow rates to improve the measurement accuracy of the ultrasonic flow meter.

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Section: Introductionmentioning

confidence: 99%

Study on flow field and measurement characteristics of a small-bore ultrasonic gas flow meter

Chen

Cao

Cui

2021

Measurement and Control

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“…The working principle of TM-USM is shown in Equations ( 1)-(3) and Figure 1 [7,8], where v is the inlet flow velocity, L is the propagation path length, D is the pipe diameter, ϕ is the path angle, c is the sound velocity, and i represents a different path. The flow velocity of each path can be calculated by the difference between the downstream propagation time t d and upstream propagation time t u :…”

Section: Introductionmentioning

confidence: 99%

“…(3) The research on USM was mainly focused on two aspects. The first aspect was the continuous improvement of the structure of USM itself, such as using multi-path ultrasonic flowmeters [9,10], optimizing the layout of paths, weights of the acoustic paths [11,12], the installation angle of the transducers [13,14], multiple reflections of ultrasonic signals in the pipe [8], and so on. There are many manufacturers that all had different types of USMs with stable performance on the market [3,15,16].…”

Section: Introductionmentioning

confidence: 99%

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The Investigation on the Flow Distortion Effect of Header to Guarantee the Measurement Accuracy of the Ultrasonic Gas Flowmeter

Chen

2021

Applied Sciences

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The quantification of the flow distortion effect on the measurement accuracy of the ultrasonic gas flowmeter downstream of the header is important but an area that has been of less concern in the research. By experiments and computational fluid dynamics (CFD), the influence of flow field distortion was studied. Experimental results under three different installation conditions showed that when there was flow field distortion downstream of the header, the measurement results of the gas ultrasonic flowmeter were 1% higher than those when there was no distortion, while a flow conditioner could effectively eliminate flow field distortion. Based on the experimental tests, the flow field distribution was analyzed with CFD, which showed that the flow field distortion effect generated by the header had a significant influence on the parameter of nonconforming Profile factor, while the parameters of Symmetry and Cross-flow could be obviously eliminated by the double-cross-section designing.

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“…Ultrasonic flow measurement with the transit time method includes invasive and non-invasive techniques (Fan et al, 2018;Peter Baldwin, 2012). Unlike invasive measurement, noninvasive measurement involves using one or more pairs of ultrasonic transducers (sensors) mounted on the pipe without any modifications of the pipe and the flow (Fan et al, 2018;Hiroshi et al, 2017;Mousavi et al, 2020). Clamp-on meters are specified to achieve 2%-3% uncertainty, so they are appropriate for non-fiscal and process gas applications (Frasier, 2013;Jiang et al, 2017;Han et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

New semi three-dimensional approach for simulation of Lamb wave clamp-on ultrasonic gas flowmeter

Mousavi¹,

Hashemabadi

Jamali

2020

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Purpose The purpose of this study is to numerically simulate the Lamb wave propagation through a clamp-on ultrasonic gas flowmeter (UGF) in contact mode, using a new semi three-dimensional approach. Moreover, experimental and analytical modeling results for transit time difference method have been used to confirm the simulation results at different gas flow velocities from 0.3 to 2.4 m/s. Design/methodology/approach The new semi three-dimensional approach involves the simulation of the flow field of the gas in a three-dimensional model and subsequently the simulation of wave generation, propagation and reception in a two-dimensional (2D) model. Moreover, the analytical model assumes that the wave transitions occur in a 2D mode. Findings The new approach is a semi three-dimensional approach used in this work, has better accuracy than a complete 2D simulation while maintaining the computing time and costs approximately constant. It is faster and less expensive than a complete 3D simulation and more accurate than a complete 2D simulation. It was concluded that the new approach could be extended to simulate all types of ultrasonic gas and non-gas flowmeters, even under harsh conditions. Originality/value In this work, a new approach for the numerical simulation of all types of ultrasonic flowmeters is introduced. It was used for simulation of a Lamb wave ultrasonic flow meter in contact mode.

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Calculation of geometric flow profile correction factor for ultrasonic flow meter using semi-3D simulation technique

Cited by 28 publications

References 28 publications

Study on flow field and measurement characteristics of a small-bore ultrasonic gas flow meter

Study on flow field and measurement characteristics of a small-bore ultrasonic gas flow meter

The Investigation on the Flow Distortion Effect of Header to Guarantee the Measurement Accuracy of the Ultrasonic Gas Flowmeter

New semi three-dimensional approach for simulation of Lamb wave clamp-on ultrasonic gas flowmeter

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