Upstream-flow-based mechanisms for global flow regime transition of gas/liquid two-phase flow in pipeline-riser systems

Zou, Suifeng; Guo, Liejin; Yao, Tianxiang

doi:10.1016/j.ces.2021.116542

Cited by 10 publications

(2 citation statements)

References 42 publications

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“…A gas-liquid two-phase flow is a common phenomenon in oil pipelines [1][2][3], especially for the oil transportation under oil wells and offshore. Fluid flow patterns change with increasing of the mass flow rates of both phases, and different flow regimes are defined successively, such as smooth-stratified flow, wave-stratified flow, annular flow, mist flow, slug flow, plug flow, and bubble flow.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Gas-Liquid Two-Phase Stratified Flow at High Pressure in a Horizontal Pipe

Wang,

Yu,

Liu

et al. 2024

Energies

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This study investigates wave-stratified flow in a horizontal pipe at high pressure, and flow characteristics are obtained, such as flow pattern map, liquid film thickness, and pressure drop. Compared with a flow pattern map of a gas-liquid two-phase flow carried out at atmosphere, stratified flow zone is depressed with increasing system pressure and the critical gas superficial velocity decreases for smooth-wave-stratified flow transition, while the critical liquid superficial velocity increases for stratified-intermittent transition. On one hand, the compressed air results in an increase in momentum transfer between gas and liquid phases, which accounts for the smaller gas superficial velocity that is encountered in both smooth-wave and stratified-annular flow transition at higher pressure. One the other hand, it slows down the liquid below the crest, and it makes the interface wave crest unstable and split for the vortex shedding behind the wave crest, which accounts for flow regime transition in gas-liquid two-phase flows in pipelines. As a result, stratified-intermittent flow transition is depressed and delayed. The pressure influence on the liquid film profile is analyzed, and relationships between film thickness and dimensionless numbers are studied, such as liquid Weber number and gas Weber number. Friction factors on different interfaces at high pressure are studied, and new empirical formulas are deduced..

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Gas-Liquid Two-Phase Stratified Flow at High Pressure in a Horizontal Pipe

Wang,

Yu,

Liu

et al. 2024

Energies

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“…The flow of oil gas in pipes can reform its structure continuously depending on the thermodynamic properties and flow operation conditions like phases' velocities, pipe inlet diameter, and pressure [3]. Parameters like the operating velocities and pressure drops are considered very consequential for designing an efficient pumping system [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Investigation in Gas-Oil Two-Phase Flow using a Differential Pressure Transducer and Wire Mesh Sensor in Vertical Pipes

Musa

Mahmood

Simo

et al. 2022

EMITTER Int'l J. of Engin. Technol.

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The current study is performed to identify the flow regimes of oil-gas two-phase flow experimentally in a vertical pipe has an internal diameter of 6.7 cm. It also aims to provide more details about the possibility of using Differential Pressure Transducers (DPT) for indicating flow patterns. A flow development of oil and gas has been investigated in a vertical pipe of 6 m in length and operated at atmospheric pressure. A series of experiments have been run to cover a range of inlet oil superficial velocities from 0.262 to 0.419 m/s, and inlet gas superficial velocities from 0.05 to 4.7 m/s. Wire Mesh Sensors (WMS) have been used to collect the obtained void fraction values of the flow. The Differential Pressure Transducer (DPT) is utilized to measure the pressure drop values of a one-meter along the pipe. The flow patterns are classified according to the analysis of void fractions, pressure gradients regarding time series, tomographic images, probability density functions of the void fractions, and pressure gradients. A bubbly flow is observed at low superficial velocities of gas and liquid, slug flow is observed at the lower flow rate of liquid and moderate flow rates of gas, while the churn flow pattern is recognized at the higher rates of liquid and gas. Also, the result has revealed the possibility of using Differential Pressure Transducers (DPT) to classify the gas-oil flow patterns in vertical pipes.

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Study on eliminating severe slugging by manual and automatic choking in long pipeline-riser system

Zhao,

Xu,

et al. 2024

Chemical Engineering Science

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Upstream-flow-based mechanisms for global flow regime transition of gas/liquid two-phase flow in pipeline-riser systems

Cited by 10 publications

References 42 publications

Experimental Study on Gas-Liquid Two-Phase Stratified Flow at High Pressure in a Horizontal Pipe

Experimental Study on Gas-Liquid Two-Phase Stratified Flow at High Pressure in a Horizontal Pipe

Investigation in Gas-Oil Two-Phase Flow using a Differential Pressure Transducer and Wire Mesh Sensor in Vertical Pipes

Study on eliminating severe slugging by manual and automatic choking in long pipeline-riser system

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