ISSN 2466-4677; e-ISSN 2466-4847
SCImago Journal Rank
2023: SJR=0.19
CWTS Journal Indicators
2023: SNIP=0.57
EFFECT OF DIAMETER RATIO AND INCLINATION ANGLE ON AIR-WATER SEPARATION OCCURRED AT A SMALL DIAMETER T-JUNCTION
Authors:
Georgios K. Makrygiannis1
, Dionissios P. Margaris1
Received: 05.12.2019.
Accepted: 27.02.2020.
Available: 31.03.2020.
Abstract:
The simple geometry configuration of T-junctions and their capability to act as partial phase separators, especially on offshore platforms, made them common pipeline system components in power and process industries. Moreover, in the pursuit of achieving better phase separation by controlling the maldistribution occurred in the component phases of a mixture at the junction, industries often utilise reduced T-junctions. Nevertheless, most of the published data in which industries was based on to adopt the previous configuration was relating on fully horizontal T-junctions with large main pipe diameters although T-junctions are rarely placed in a horizontal position in such industries, whilst the usage of small main pipe diameters could also lead to scaling down their size. In this regard, the present paper aimed to extend the available data by performing numerical analysis and studying both regular and reduced T-junctions with a small main pipe diameter, and upward inclination angles. It was observed that reduced Tjunctions performed worse in terms of phase separation compared to regular T-junctions for all inlet conditions applied and irrespective of the side arm inclination, whereas in case of regular T-junctions a superior separation performance was ensured for the inclined side arm at 30°.
Keywords:
T-junction, inclination angle, diameter ratio, phase separation, water carryover
References:
[1] R.C. Bowden, I.G. Hassan, The Onset of Gas Entrainment from a Flowing Stratified GasLiquid Regime in Dual Discharging Branches: Part I: Flow Visualization and Related Phenomena. International Journal of Multiphase Flow, 37 (10), 2011: 1358-1370. https://doi.org/10.1016/j.ijmultiphaseflow.2011.06.009
[2] J. Chen, S. Wang, H. Ke, M. Zhou, X. Li, Experimental Investigation of Annular TwoPhase Flow Splitting at a Microimpacting TJunction. Chemical Engineering Science, 118, 2014: 154-163. https://doi.org/10.1016/j.ces.2014.07.018
[3] A. Saieed, W. Pao, F.M. Hashim, Effect of TJunction Diameter Ratio on Stratified-Wavy Flow Separation. Journal of Natural Gas Science and Engineering, 51, 2018: 223-232. https://doi.org/10.1016/j.jngse.2018.01.015
[4] L. Oranje, Condensate Behavior in Gas Pipelines is Predictable. Oil and Gas Journal, 71, 1973: 39-44.
[5] D.F. Bergman, M.R. Tek, D.L.V. Katz, Retrograde Condensation in Natural Gas Pipelines. American Gas Association, 1975.
[6] L. Yang, J. Wang, Z. Zhao, S. Xu, B.J. Azzopardi, H. Wang, Phase Separation of Gas-Liquid TwoPhase Stratified and Plug Flows in Multitube T-Junction Separators. AIChE Journal, 63 (6), 2017: 2285-2292. https://doi.org/10.1002/aic.15552
[7] G. Baker, W.W. Clark, B.J. Azzopardi, J. Wilson, Controlling the Phase Separation of Gas-Liquid Flows at Horizontal T-Junctions. AIChE Journal, 53 (8), 2007: 1908-1915. https://doi.org/10.1002/aic.11223
[8] K. Hong, Two-Phase Flow Splitting at a Pipe Tee. Journal of Petroleum Technology, 30 (2), 1978: 290-296. https://doi.org/10.2118/6530-PA
[9] S. Rea, B.J. Azzopardi, The Split of Horizontal Stratified Flow at a Large Diameter T-Junction. AIChE Journal, 79 (4), 2001: 470-476. https://doi.org/10.1205/026387601750282409
[10] K. Zetzmann, Phasenseparation und Druckabfall in zweiphasig durchströmten vertikalen Rohrabzweigungen (Ph.D. Thesis). University of Hannover, Hannover, 1982.
[11] S. Marti, O. Shoham, A Unified Model for Stratified-Wavy Two-Phase Flow Splitting at a Reduced T-Junction with an Inclined Branch Arm. International Journal of Multiphase Flow, 23 (4), 1997: 725-748. https://doi.org/10.1016/S0301-9322(97)82477-9
[12] B.J. Azzopardi, The Effect of the Side Arm Diameter on the Two-Phase Flow Split at a TJunction. International Journal of Multiphase Flow, 10 (4), 1984: 509-512. https://doi.org/10.1016/0301-9322(84)90059-4
[13] A. Saieed, B. Sam, W. Pao, F.M. Hashim, Numerical Investigation of Side Arm Gas Volume Fraction in Two Phase T-Junction. Journal of Mechanical Engineering and Sciences, 10 (3), 2016: 2311-2323.
https://doi.org/10.15282/jmes.10.3.2016.9.0215
[14] L. Yang, B.J. Azzopardi, Phase Split of LiquidLiquid Two-Phase Flow at a Horizontal TJunction. International Journal of Multiphase Flow, 33 (2), 2007: 207-216. https://doi.org/10.1016/j.ijmultiphaseflow.2006.08.004
[15] O. Shoham, S. Arirachakaran, J.P. Brill, TwoPhase Flow Splitting in a Horizontal Reduced Pipe Tee. Chemical Engineering Science, 44 (10), 1989: 2388-2391. https://doi.org/10.1016/0009-2509(89)85174-7
[16] B.J. Azzopardi, The Effect of Side Arm Diameter on Phase Split at T-Junctions, SPE Annual Technical Conference and Exhibition, 3-6 October, 1999, Houston, Texas.
[17] E.M.K. Wren, Geometric Effects on Phase Split at a Large Diameter T-Junction (Ph.D. Thesis). University of Nottingham, Nottingham, 2001.
[18] E. Wren, B.J. Azzopardi, Affecting the Phase Split at a Large Diameter T-Junction by Using Baffles. Experimental Thermal and Fluid Science, 28 (8), 2004: 835-841. https://doi.org/10.1016/j.expthermflusci.2003.12.017
[19] S. Griston, J.H. Choi, Two-Phase Flow Splitting at Side-Branching Tees, SPE Western Regional Meeting, 10-13 May, 1998, Bakersfield, California.
[20] L. Walters, H. Soliman, G. Sims, Two-Phase Pressure Drop and Phase Distribution at Reduced Tee Junctions. International Journal of Multiphase Flow, 24 (5), 1998: 775-792.
[21] W. Seeger, J. Reimann, U. Müller, Two-Phase Flow in a T-Junction with a Horizontal Inlet. Part I: Phase Separation, International Journal of Multiphase Flow, 12 (4), 1986: 575-585. https://doi.org/10.1016/0301-9322(86)90061-3
[22] V.R. Penmatcha, Two-Phase Flow Splitting at a Tee Junction with a Downward Inclined Branch Arm (M.Sc. Thesis). The University of Tulsa, Tulsa, 1993.
[23] P.J. Ashton, Two-Phase Flow Splitting at a Tee Junction with an Upward Inclined Branch Arm (M.Sc. Thesis). The University of Tulsa, Tulsa, 1993.
[24] V.R. Penmatcha, P.J. Ashton, O. Shoham, TwoPhase Stratified Flow Splitting at a T-Junction. International Journal of Multiphase Flow, 22(6), 1996: 1105-1122. https://doi.org/10.1016/0301-9322(96)00033-X
[25] T. Stacey, B.J. Azzopardi, G. Conte, The Split of Annular Two-Phase Flow at a Small Diameter TJunction. International Journal of Multiphase Flow, 26 (5), 2000: 845-856. https://doi.org/10.1016/S0301-9322(99)00051-8
[26] G.K. Makrygiannis, D.P. Margaris, Two- and Three-Dimensional Computational Investigation of the Separation Efficiency of an Air-Water Mixture Flowing Through an Inclined T-Junction Branch, 8th International Conference on Experiments/Process/System Modeling/Simulation/Optimization (8th ICEPSMSO), 3-6 July, 2019, Athens, Greece.
[27] M. Gourma, P.G. Verdin, Two-Phase Slug Flows in Helical Pipes: Slug Frequency Alterations and Helicity Fluctuations. International Journal of Multiphase Flow, 86, 2016: 10-20. https://doi.org/10.1016/j.ijmultiphaseflow.2016.07.013
[28] L. Xing, H. Yeung, J. Shen, Y. Cao, Numerical Study on Mitigating Severe Slugging in Pipeline/Riser System with Wavy Pipe. International Journal of Multiphase Flow, 53, 2013: 1-10. https://doi.org/10.1016/j.ijmultiphaseflow.2013.01.003
[29] J. Jaeger, C.M. Santos, L.M. Rosa, H.F. Meier, D. Noriler, Experimental and Numerical Evaluation of Slugs in a Vertical Air-Water Flow. International Journal of Multiphase Flow, 101, 2018: 152-166.
https://doi.org/10.1016/j.ijmultiphaseflow.2018.01.009
[30] Y. Liu, W.Z. Li, Numerical Simulation on TwoPhase Bubbly Flow Split in a Branching TJunction. International Journal of Air-Conditioning and Refrigeration, 19 (4), 2011:253-262 https://doi.org/10.1142/S2010132511000612
[31] Y. Taitel, A.E. Dukler, A Model for Predicting Flow Regime Transitions in Horizontal and Near Horizontal Gas-Liquid Flow. AIChE Journal, 22(1), 1976. https://doi.org/10.1002/aic.690220105
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
How to Cite
G.K. Makrygiannis, D.P. Margaris, Effect of Diameter Ratio and Inclination Angle on Air-Water Separation Occurred at a Small Diameter T-Junction. Applied Engineering Letters. 5(1), 2020: 22–30.
https://doi.org/10.18485/aeletters.2020.5.1.4
More Citation Formats
Makrygiannis, G. K., & Margaris, D. P. (2020). Effect of Diameter Ratio and Inclination Angle on Air-Water Separation Occurred at a Small Diameter T-Junction. Applied Engineering Letters. 5(1), 22–30. https://doi.org/10.18485/aeletters.2020.5.1.4
Makrygiannis, Georgios K., and Dionissios P. Margaris. “Effect of Diameter Ratio and Inclination Angle on Air-Water Separation Occurred at a Small Diameter T-Junction.” Applied Engineering Letters, vol. 5, no. 1, 2020, pp. 22–30, https://doi.org/10.18485/aeletters.2020.5.1.4.
Makrygiannis, Georgios K, and Dionissios P Margaris. 2020. “Effect of Diameter Ratio and Inclination Angle on Air-Water Separation Occurred at a Small Diameter T-Junction.” Applied Engineering Letters 5 (1): 22–30. https://doi.org/10.18485/aeletters.2020.5.1.4.
Makrygiannis, G.K. and Margaris, D.P. (2020). Effect of Diameter Ratio and Inclination Angle on Air-Water Separation Occurred at a Small Diameter T-Junction. Applied Engineering Letters. 5(1), pp.22–30. doi: 10.18485/aeletters.2020.5.1.4.
SCImago Journal Rank
2023: SJR=0.19
CWTS Journal Indicators
2023: SNIP=0.57
EFFECT OF DIAMETER RATIO AND INCLINATION ANGLE ON AIR-WATER SEPARATION OCCURRED AT A SMALL DIAMETER T-JUNCTION
Authors:
Georgios K. Makrygiannis1
, Dionissios P. Margaris1
Received: 05.12.2019.
Accepted: 27.02.2020.
Available: 31.03.2020.
Abstract:
The simple geometry configuration of T-junctions and their capability to act as partial phase separators, especially on offshore platforms, made them common pipeline system components in power and process industries. Moreover, in the pursuit of achieving better phase separation by controlling the maldistribution occurred in the component phases of a mixture at the junction, industries often utilise reduced T-junctions. Nevertheless, most of the published data in which industries was based on to adopt the previous configuration was relating on fully horizontal T-junctions with large main pipe diameters although T-junctions are rarely placed in a horizontal position in such industries, whilst the usage of small main pipe diameters could also lead to scaling down their size. In this regard, the present paper aimed to extend the available data by performing numerical analysis and studying both regular and reduced T-junctions with a small main pipe diameter, and upward inclination angles. It was observed that reduced Tjunctions performed worse in terms of phase separation compared to regular T-junctions for all inlet conditions applied and irrespective of the side arm inclination, whereas in case of regular T-junctions a superior separation performance was ensured for the inclined side arm at 30°.
Keywords:
T-junction, inclination angle, diameter ratio, phase separation, water carryover
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)