Gas-liquid flow splitting in T-junction with inclined lateral arm

Yang, Lele; Liu, Shuo; Li, Hua; Zhang, Jian; Wu, Yue; Xu, Jing-yu

doi:10.1007/s42241-018-0019-4

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…Additionally, the crude oil used above was chosen as the liquid phase. A separation efficiency parameter η was introduced to analyze the separation result . It is used to describe the gas–liquid two-phase separation consequence available. In the equation above, Q g, up‑outlet and Q g, inlet are the gas flow rates in the up-outlet and the inlet of the T-junction (m 3 /h).…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, a mechanistic model was devised to predict the splitting characteristics for the T-junction with an inclined sidearm. Yang et al 12 reported that the inclined angle of the sidearm has a significant influence on the separation efficiency of a T-junction when the angle is in the range of 0− 30°, it was also reported that the separation efficiency increased as the angle was increased. However, the effect is negligible when the inclined angle is larger than 30°.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Zhang

Liu

et al. 2020

ACS Omega

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The T-junction is a novel type of separator used in the petroleum and gas industry. It is used to achieve the gas–liquid or liquid–liquid two-phase separation. To obtain an applicative T-junction separator, in the present study, the gas–liquid two-phase separation characteristics in multiple inclined T-junctions were investigated through a series of numerical simulations and field experiments. Two representative multiphase modes, namely, the Euler model and the mixture model, were chosen for this study. Comparisons of the field experiments were made to obtain a highly accurate simulation model. The mixture model was chosen to be better suited for this study. It is used to investigate the gas–liquid two-phase flow and the separation behaviors, which include the effect of inlet flow velocity, inlet bubble diameter, and the split ratio of two outlets. The results indicate that the best flow split ratio exists when the two-phase separation reaches the best consequence, and the best flow split ratio changes when the separation demands of gas or liquid are different. Furthermore, the separation efficiency keeps decreasing as the inlet velocity is increased. Hence, the inlet mixture velocity should be reduced to improve the gas–liquid two-phase separation. More specifically, to obtain a better separation for the same throughput, the size of the T-junction should be increased. Moreover, the separation efficiency increases as the inlet bubble diameter increases. Consequently, the results can be used to design the T-junction as an industrial separator, which can then be directly used in petroleum and gas production.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Zhang

Liu

et al. 2020

ACS Omega

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“…As can be seen, the results predicted are very satisfactory. They demonstrate that the method can be used to calculate the gas content at the liquid outlet for gas-liquid separation when gravity plays an important role [15].…”

Section: Discussionmentioning

confidence: 99%

Study of the Performance of a New Kind of Downhole Gas-Liquid Separation with High Gas Content

Meng¹

2019

JENR

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In the downhole, gas separation is crucial for the Electrical Submergible Pumps' normal operation. This paper presents a new type of downhole gas-liquid separator (DGLS) and studies its separation performance in experiments that interests the oil industry. Laboratory results show that the pressure drop in the DGLS is rather small and that the gas-liquid separation in the DGLS can be seen as an incompressible flow. When the split ratio equals the gas content at the inlet, complete gas-liquid separation occurs. In addition, as the liquid density increases, the gas-liquid separation performance improves. The separation mechanism of the DGLS is related to the centrifugal acceleration, which is better when it is less than 30 times the gravitational acceleration. A method for predicting the separation performance is proposed.

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“…However, the superficial velocities of both phases in case Saieed [1] are higher in comparison to the present study. Liu and Li [29] stated that flow separation in T-junction is governed by phase inertia difference [30]. This inertia difference can be interpreted in terms of gas to liquid phase velocity ratio.…”

Section: Validationmentioning

confidence: 99%

Experimental investigation of multiphase separation in different flow regimes through T-junction with an expander section

Memon

Pao

Hashim

et al. 2019

JMES

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The experimental data for phase separation of the air-water mixture in a T-Junction with the expander section after the branch arm is presented in this work. The main and run arms of the T-junction are directed along the horizontal plane with the branch arm positioned in the vertical plane. The diameter of the main arm is 74 mm, with diameter ratio(s) of, 0.67, and 0.33 in relation to branch arm. At the inlet section of the T-junction, the flow regimes generated were stratified, stratified wavy and slug flow. At the inlet, the air and water superficial velocities are in the range of 0.25 - 0.140 m/s and 0.14-0.78 m/s respectively. The effect of the expander section after the branch arm, the air superficial velocity USA and water superficial velocity USw on liquid carryover (WL3/WL1)max in branch arm have been studied. Based on the experimental data obtained for T-junction with expander section, complete phase separation of air and water was observed in stratified and stratified wavy flow for all superficial velocities and improved phase separation for slug flow. In slug flow, increasing the liquid superficial velocity improves the phase separation but increasing the gas velocity decreases the phase separation. Finally, the volume weighted phase in this new T-junction design is compared with the phase separation data of a simple T-junction.

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Gas-liquid flow splitting in T-junction with inclined lateral arm

Abstract: Abstract:Thi T-junction is r inclination ang number of con a good separa designed for t optimal split r

Cited by 11 publications

References 7 publications

Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Study of the Performance of a New Kind of Downhole Gas-Liquid Separation with High Gas Content

Experimental investigation of multiphase separation in different flow regimes through T-junction with an expander section

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