A study on the modeling of static pressure distribution of wet gas in <scp>V</scp>enturi

Yu, Peng; Xu, Ying; Zhang, Tao; Zhu, Zhenshu; Ba, Xili; Li, Jing; Qin, Zigeng

doi:10.1002/aic.14657

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…The droplets with the Sauter Mean Diameter ( d 32 ) are used to simulate the effects of droplet swarms on the flow; (b) ignore the interactions between the droplets and liquid film; (c) the transient processes are not considered. These assumptions have been validated by the numerical simulations of annular (-mist) flow in the Venturi tube [ 21 , 22 , 23 ]. The results showed that the assumptions were reasonable to simulate the steady characteristics of the flow through the Venturi tube.…”

Section: Numerical Methods and Modelsmentioning

confidence: 99%

Experiment and Numerical Simulation on Gas-Liquid Annular Flow through a Cone Sensor

Chen

Bai

2018

Sensors

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The cone meter has been paid increasing attention in wet gas measurement, due to its distinct advantages. However, the cone sensor, which is an essential primary element of the cone meter, plays a role in the measurement of wet gas flow that is important, but not fully understood. In this article, we investigate the gas-liquid annular flow through a cone sensor by experiment and numerical simulation. Emphasis is put on the influences of pressure recovery characteristics and flow structure, and how they are affected by the cone sensor. The results show that the vortex length is shortened in gas-liquid annular flow, compared with that in single-phase gas flow. The pressure recovery length is closely related with the vortex length, and shorter vortex length leads to shorter pressure recovery length. The gas-liquid distribution suggests that flow around the apex of back-cone is very stable, little liquid is entrained into the vortex, and no liquid appears around the low pressure tapping, which makes a more stable pressure at the apex of cone sensor feasible. This finding highlights the importance of obtaining the low pressure from the back-cone apex, which should be recommended in the multiphase flow measurement. Our results may help to guide the optimization of the cone sensor structure in the wet gas measurement.

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Section: Numerical Methods and Modelsmentioning

confidence: 99%

Experiment and Numerical Simulation on Gas-Liquid Annular Flow through a Cone Sensor

Chen

Bai

2018

Sensors

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“…Equations (3) and (4) are referred to as the general model because its basic form can be theoretically derived. For example, if the pressure drop of convergent section is assumed to be dominated by the accelerate pressure drop [ 26 ], then the differential form of the pressure drop can be written as:

…”

Section: Theoretical Modelmentioning

confidence: 99%

A Wet Gas Metering System Based on the Extended-Throat Venturi Tube

Xue

Zhang

et al. 2021

Sensors

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Although the use of a classical Venturi tube for wet gas metering has been extensively studied in the literature, the use of an extended-throat Venturi (ETV) tube has rarely been reported since its first proposal by J. R. Fincke in 1999. The structure of an ETV is very simple, but due to the complexity of multiphase flow, its theoretical model has not been fully established yet. Therefore, in this paper theoretical models have been developed for the convergent and throat sections of an ETV, and the gradients of front and rear differential pressures are derived analytically. Several flowrate algorithms have been proposed and compared with the existing ones. Among them, the iteration algorithm is found to be the best. A reasonable explanation is provided for its performance. The relationship between the differential pressure gradient and the flowrate relative error is also studied, such that the relative error distributions varying with ETV measured flowrates can be derived. The gas flowrate error of ETV increases with the liquid content whilst the liquid flowrate error of ETV decreases with the liquid content, and the relative errors of liquid flowrate are generally 2 to 3 times larger than that of the gas flowrate. Finally, the ETV tends to be more accurate than the classical Venturi tube. The ETV can be designed more compact under the same signal intensity due to its significantly higher velocity in the throat section.

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“…Figure 10 shows plots of the experimental and calculated two-phase mass flow rate obtained from the homogeneous model and the correlations of Chisholm, 4 James 28 and Zhang et al 30 it is seen from Figure 10(a) and as expected, the homogeneous flow model is less accurate than the others, and the accuracy decreases more with increasing the total two-phase mass flow rate which is due to the effect of the slip ratio. Figure 10 In order to quantify the deviation between the experimental two-phase mass flow rate data and that from correlations summarized in Table 3, the root mean square (RMS) deviation and the mean relative absolute error (ABE) were calculated as given in equations ( 23) and (25).…”

Section: Assessment Of the Two-phase Mass Flow Correlationsmentioning

confidence: 99%

“…The given correlation is fitted by experimental data of wet gas pressure drop in a Venturi meter positioned horizontally. Peining et al 25 developed a model for calculating axial static pressure in Venturi meter using the hydrodynamics theory. The wet gas annular flow was the interest of their study.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical study and experimental measurement of the gas liquid two-phase flow through a vertical Venturi meter

Zeghloul

Messilem

Ghendour

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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An accurate two-phase flow rate measurement is essential in many applications and industries such as; oil/gas, chemical, pipeline transportation and nuclear industry. This paper presents the findings obtained from two-phase flow rate measurements using Venturi meters coupled with conductance probe sensors. The measurement system and presented methodology can be used to directly and continuously measure the mass flow rate of gas-liquid flows without any need for using a separator. Most of the available data in literature on mass flow rate using Venturis in gas-liquid two phase flows are limited/valid to a certain flow regime. However, the experimental data presented in this paper covered a wide range of flows (i.e. bubbly, slug and churn flows). Three Venturis with different diameter ratios, β = 0.40, β = 0.55 and β = 0.75 have been employed using an air-water vertical test section. The effect of the Venturi’s geometry on the flow behaviour was also evaluated. The average void fraction and void fraction time series have been measured along the test section by nine different conductance probe sensors covering the convergent, throat and divergent sections. In addition, the two-phase pressure drop across the Venturi was measured. Moreover, a new correlation for the gas-liquid slip ratio was proposed in this paper, which is necessary for calculating the two-phase mass flow rate. The proposed slip ratio correlation showed more accuracy than the ones available in literature. It was found that the correlation proposed by Chisholm to predict the two-phase mass flow rate in Venturis with a diameter ratio, β = 0.55, shows the best accuracy among others such as; Murdock, Lin, James and Zhang correlations.

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A study on the modeling of static pressure distribution of wet gas in Venturi

Cited by 13 publications

References 19 publications

Experiment and Numerical Simulation on Gas-Liquid Annular Flow through a Cone Sensor

Experiment and Numerical Simulation on Gas-Liquid Annular Flow through a Cone Sensor

A Wet Gas Metering System Based on the Extended-Throat Venturi Tube

Theoretical study and experimental measurement of the gas liquid two-phase flow through a vertical Venturi meter

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