0
Research Papers: Multiphase Flows

Co-Current Gas-Liquid Smooth-Stratified Flow in a Horizontal Reduced T-Junction Including Wavy and Slug Regime Transition Boundaries

[+] Author and Article Information
Robert C. Bowden

Department of Mechanical and Industrial Engineering, Concordia University, Montreal, QC, Canada, H3G 2W1

Ibrahim G. Hassan1

Department of Mechanical and Industrial Engineering, Concordia University, Montreal, QC, Canada, H3G 2W1IbrahimH@alcor.concordia.ca

1

Corresponding author.

J. Fluids Eng 133(5), 051301 (May 31, 2011) (11 pages) doi:10.1115/1.4003853 History: Received March 08, 2010; Revised March 01, 2011; Published May 31, 2011; Online May 31, 2011

Experiments were performed in a horizontal reduced T-junction using a branch diameter of 6.35 mm and an inlet pipe diameter of 50.8 mm. The inlet length was 1.8 m and three branch orientations were tested at 0, 45, and 90 degrees down from the horizontal. Water and air, operating at 206 kPa, were used to provide an adiabatic two-phase environment. Both fluids flowed co-currently within the inlet towards the branch in the smooth-stratified regime. Results demonstrate the relationship between the interface height and the inlet and branch two-phase quantities, including the inlet superficial liquid and gas velocities, and branch two-phase mass flow rate and quality. In certain instances transitions to wavy-stratified or slug regimes were observed and these limits are quantified for each branch orientation. Flow visualization was used to identify the initiation of two-phase flow in the branch, including the onsets of gas and liquid entrainment. The critical height at the onset of gas entrainment was quantified as a function of the single phase liquid branch Froude number for the 45 and 90 degree branches, respectively. The branch quality results were scaled using the critical height and showed good agreement with selected models.

Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 3

Schematic of the experimental facility (elevation view)

Grahic Jump Location
Figure 4

Inlet conditions during co-current air–water flow in a horizontal pipe

Grahic Jump Location
Figure 5

Example of wavy regime observations during the OGE in the bottom branch

Grahic Jump Location
Figure 6

Example of slug development at the OGE in the bottom branch

Grahic Jump Location
Figure 7

Observed inlet regimes as compared with the work of Mandhane (Ref. [22]) and their flow regime map.

Grahic Jump Location
Figure 8

Onset of gas entrainment in the bottom branch showing the (a) critical height and (b) inlet conditions

Grahic Jump Location
Figure 9

Comparison between the present OGE results in a bottom branch to selected studies

Grahic Jump Location
Figure 10

Two-phase results with the bottom branch showing the inlet (a) superficial liquid velocity (b) superficial gas velocity, the branch (c) mass flow rate and (d) flow quality related to the interface height

Grahic Jump Location
Figure 11

Sketches of observed air core development during two-phase flow in the bottom branch with decreasing interface height from (a) to (c)

Grahic Jump Location
Figure 12

Comparison of two-phase quality in the bottom branch with selected studies using the scaled interface height, H+

Grahic Jump Location
Figure 13

Onset of gas entrainment in the inclined branch demonstrating the (a) critical height and (b) inlet conditions

Grahic Jump Location
Figure 14

Two-phase results with the inclined branch showing the inlet (a) superficial liquid velocity (b) superficial gas velocity, the branch (c) mass flow rate and (d) flowquality related to the interface height

Grahic Jump Location
Figure 15

Sketches of observed flow structure during two-phase flow in the inclined branch with decreasing interface height from (a) to (c)

Grahic Jump Location
Figure 16

Comparison of two-phase quality in the inclined branch with Hassan [17] using the scaled interface height, H+

Grahic Jump Location
Figure 17

Two-phase results with the side branch showing the inlet (a) superficial liquid velocity (b) superficial gas velocity, the branch (c) mass flow rate and (d) flow quality related to the interface height

Grahic Jump Location
Figure 18

Comparison of side branch results with selected studies for (a) the critical height and (b) branch quality

Grahic Jump Location
Figure 1

Problem description

Grahic Jump Location
Figure 2

Test section details, elevation view

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In