Experiment investigation of two-phase flow pattern transition and frictional pressure drop of R600a in a horizontal tube

Yang, Zhiqiang; Gong, Maoqiong; Chen, Gaofei; Zou, Xiang; Zhuang, Xiaoru; Song, Qinglu; Shen, Jun

doi:10.1360/n972017-00587

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…Lockhart [16], Shannak [17], Zhang et al [18], and Pamitran et al [19] developed the correlations for the calculation of frictional pressure drop. Yang et al [20] found that the flow patterns affect the frictional pressure drop. Shaahid et al [21] analyzed the effects of different inclination angles on the two-phase frictional pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Frictional Pressure Drop and Liquid Holdup of Churn Flow in Vertical Pipes with Different Viscosities

Liu

Su²,

Lü

et al. 2021

Geofluids

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Churn flow commonly exists in the pipe of heavy oil, and the characteristics of churn flow should be widely understood. In this paper, we carried out air and viscous oil two-phase flow experiments, and the diameter of the test section is 60 mm. The viscosity range of the oil was 100~480 mPa·s. Based on the measured liquid holdup and pressure drop data of churn flow, it can be concluded that, due to the existence of liquid film backflow, positive and negative frictional pressure drop can be found and the change of frictional pressure drop with the superficial gas velocity is related to superficial liquid velocity. With the increase of viscosity, the change rate of frictional pressure drop increases with the increase of the superficial gas velocity. Combining our previous work and the Taitel model, we proposed a new pressure drop model for viscous oil-air two-phase churn flow in vertical pipes. By comparing the predicted values of existing models with the measured pressure drop data, the proposed model has better performance in predicting the pressure drop.

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Section: Introductionmentioning

confidence: 99%

Frictional Pressure Drop and Liquid Holdup of Churn Flow in Vertical Pipes with Different Viscosities

Liu

Su²,

Lü

et al. 2021

Geofluids

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Friction pressure drop model of gas-liquid two-phase flow in an inclined pipe with high gas and liquid velocities

et al. 2019

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The calculations of friction pressure drop is the most complicated in multiphase flow. Understanding of the friction pressure drop in pipes are of great importance for many industry problems. The existing friction pressure drop models are generally based on low gas and liquid velocities in horizontal and vertical pipes. In this paper, a two-phase flow experiment in inclined pipe was performed. We report the effect of superficial gas and liquid velocities on friction pressure drop, the results indicate that the pressure drop increases with the increase in superficial gas velocity and superficial liquid velocity. According to the experimental analysis and assuming that the fluid in contact with the pipe wall at high velocity is in a liquid phase, we developed a new friction pressure drop model of different flow pattern. This model based on the correlation between the fraction factor and the superficial gas and superficial liquid Reynold numbers. Compared with the previous models, the predictive performance of the present model is good and remains basically stable.

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Experiment investigation of two-phase flow pattern transition and frictional pressure drop of R600a in a horizontal tube

Cited by 2 publications

References 18 publications

Frictional Pressure Drop and Liquid Holdup of Churn Flow in Vertical Pipes with Different Viscosities

Frictional Pressure Drop and Liquid Holdup of Churn Flow in Vertical Pipes with Different Viscosities

Friction pressure drop model of gas-liquid two-phase flow in an inclined pipe with high gas and liquid velocities

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