Experimental and Numerical Analysis of a Novel Flow Conditioner for Accuracy Improvement of Ultrasonic Gas Flowmeters

Li, Lei; Zheng, Xiya; Gao, Yang; Hu, Zhiyong; Zhao, Jiale; Tian, Shen; Wu, Yongqing; Qiao, Yiting

doi:10.1109/jsen.2022.3145668

Cited by 14 publications

(2 citation statements)

References 32 publications

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“…4c . According to the standard verification regulations 43 , each experiment was calibrated three times under ten standard flow rates: q min , 3 q min , 5 q min , 10 q min , q t , 0.2 q max , 0.4 q max , 0.7 q max , q max and 1.2 q max . Here, q min and q max represent flow rates of 2 L/h and 250 L/h, respectively.…”

Section: Resultsmentioning

confidence: 99%

A miniaturized transit-time ultrasonic flowmeter based on ScAlN piezoelectric micromachined ultrasonic transducers for small-diameter applications

Gao

Chen

et al. 2023

Microsyst Nanoeng

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Transit-time ultrasonic flowmeters (TTUFs) are among the most widely used devices for flow measurements. However, traditional TTUFs are usually based on a bulk piezoelectric transducer, which limits their application in small-diameter channels. In this paper, we developed a miniaturized TTUF based on scandium-doped aluminum nitride (ScAlN) piezoelectric micromachined ultrasonic transducers (PMUTs). The proposed TTUF contains two PMUT-based transceivers and a π-type channel. The PMUTs contain 13 × 13 square cells with dimensions of 2.8 × 2.8 mm2. To compensate for the acoustic impedance mismatch with liquid, a layer of polyurethane is added to the surface of the PMUTs as a matching layer. The PMUT-based transceivers show good transmitting sensitivity (with 0.94 MPa/V surface pressure) and receiving sensitivity (1.79 mV/kPa) at a frequency of 1 MHz in water. Moreover, the dimensions of the π-type channel are optimized to achieve a measurement sensitivity of 82 ns/(m/s) and a signal-to-noise ratio (SNR) better than 15 dB. Finally, we integrate the fabricated PMUTs into the TDC-GP30 platform. The experimental results show that the developed TTUF provides a wide range of flow measurements from 2 to 300 L/h in a channel of 4 mm diameter, which is smaller than most reported channels. The accuracy and repeatability of the TTUF are within 0.2% and 1%, respectively. The proposed TTUF shows great application potential in industrial applications such as medical and chemical applications.

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Section: Resultsmentioning

confidence: 99%

A miniaturized transit-time ultrasonic flowmeter based on ScAlN piezoelectric micromachined ultrasonic transducers for small-diameter applications

Gao

Chen

et al. 2023

Microsyst Nanoeng

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“…Finally, the full-factor experimental design (DOE) was used to optimize the design of the flow conditioner. Li et al (2022) applied the designed blade type flow conditioner to provide stable upstream flow to an ultrasonic gas flow meter. It was found that the designed flow conditioner can reduce the non-uniformity of upstream flow and improve the measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of structural parameters of the convergence flow conditioner on eccentric jet flow rectification

Liu

Chen

Tian

et al. 2023

Transactions of the Institute of Measurement and Control

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In flow measurement and control industrial application, installing a flow conditioner is an effective way to rectify irregular and unstable flow to stable flow state within a short flow distance. To effectively rectify the eccentric jet flow caused by valve regulation in pipeline, the convergence flow conditioner with convergent orifice angles has been innovatively designed and investigated. However, the effect of structural parameters (such as flow conditioner thickness and flow area) on improving unstable eccentric jet flow rectification was still not elaborated. Thus, the effect of structural parameters of the convergence flow conditioner on rectifying eccentric jet flow was examined in this paper. The structural parameters of the flow conditioner thickness and the flow area were considered under the fixed convergence angle of 12°. The experimental system of monitoring pressures upstream and downstream of the convergence flow conditioner along the pipeline was developed and corresponding numerical simulation was employed. The flow coefficient and resistance coefficient of a convergence flow conditioner under various valve openings were accessed, and monitored pressures along the pipeline were also discussed for numerical simulation verification. The velocity and streamline distributions downstream the convergence flow conditioners were comparatively analyzed. In addition, the axial velocities on various downstream cross-sections were extracted to evaluate the velocity uniformity. A dimensionless parameter of velocity deviation ratio was introduced to quantify the rectification effect of eccentric jet flow evolving in the downstream pipeline. Results showed that the convergence flow conditioner with the thickness of 6 mm and the flow area of 50% owned a better effect on rectifying the valve-induced eccentric jet flow, that is, a shorter flow length was required for changing the valve-induced eccentric unstable flow to uniform stable flow by installing a convergence flow conditioner with above structural parameters.

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A mean flow velocity estimation scheme based on flow field characteristics and distribution point optimization for carbon monitoring in coal-fired power plants: A numerical study

Wang,

Zhao,

Xie

et al. 2024

Measurement

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Experimental and Numerical Analysis of a Novel Flow Conditioner for Accuracy Improvement of Ultrasonic Gas Flowmeters

Cited by 14 publications

References 32 publications

A miniaturized transit-time ultrasonic flowmeter based on ScAlN piezoelectric micromachined ultrasonic transducers for small-diameter applications

A miniaturized transit-time ultrasonic flowmeter based on ScAlN piezoelectric micromachined ultrasonic transducers for small-diameter applications

Study on the effect of structural parameters of the convergence flow conditioner on eccentric jet flow rectification

A mean flow velocity estimation scheme based on flow field characteristics and distribution point optimization for carbon monitoring in coal-fired power plants: A numerical study

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