Gas–liquid two-phase flow equal division using a swirling flow distributor

In Part I of this two-part paper on swirling gas–liquid two-phase flow, correlations have been developed for the continuous liquid-phase velocity field under swirling conditions, such as that occurring in the lower part of the Gas–Liquid Cylindrical Cyclone (GLCC©1) compact separator. The developed correlations, including the axial, tangential, and radial velocity distributions, are applicable for swirling flow in both cyclones and pipe flow. The first objective of this paper is to extend the study of Part I by developing correlations for the turbulent quantities of the continuous liquid phase, including the turbulent kinetic energy and its dissipation rate and Reynolds shear stresses. The second objective is to study experimentally and theoretically two-phase swirling flow gas-core characteristics and stability. The first objective has been met utilizing local LDV measurements acquired for swirling flow. The developed turbulent quantities correlations have been tested against data from other studies, showing good agreement. For the second objective, experimental data have been acquired under swirling two-phase flow conditions. A model for the prediction of the gas-core diameter and stability in swirling flow field has been developed, based on the turbulent kinetic energy behavior predicted by the developed correlations. Good agreement is observed between the model predictions and the data.

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Two-Phase Flow Patterns and Pressure Drop Inside a Vertical Pipe Containing a Short Helical Tape Insert

Volume 1D, Symposia: Transport Phenomena in Mixing; Turbulent Flows; Urban Fluid Mechanics; Fluid Dynamic Behavior of Complex Particles; Analysis of Elementary Processes in Dispersed Multiphase Flows; Multiphase Flow With Heat/Mass Transfer in Process Technology; Fluid Mechanics of Aircraft and Rocket Emissions and Their Environmental Impacts; High Performance CFD Computation; Performance of Multiphase Flow Systems; Wind Energy; Uncertainty Quantification in Flow Measurements and Simulations ◽

10.1115/fedsm2014-21144 ◽

2014 ◽

Cited By ~ 2

Author(s):

Wen Liu ◽

Bofeng Bai

Keyword(s):

Pressure Drop ◽

Two Phase Flow ◽

Swirling Flow ◽

Large Diameter ◽

Experimental Studies ◽

Flow Patterns ◽

Swirl Flow ◽

Phase Flow ◽

Vertical Pipe ◽

Two Phase

Swirling gas-liquid two-phase flow patterns and pressure drop in vertical pipes of a large diameter are widely present in practical applications but not well documented in experimental studies. This paper presented an experimental study on gas-liquid two phase flow patterns and pressure drop inside a vertical pipe of 62mm in inner diameter (ID) containing a helical tape insert. Experimental results were obtained in a vertical visualization test section with a length of 7m, liquid mass velocities ranging from 0.3 to 1000 kg/(m2·s), and gas mass velocities from 3.2 to 900kg/(m2·s). Considering the decay of the swirl flow, the swirling flow regime map at different cross sections (z/D = 16, 32 and 64) were concluded, and their effects on the pressure drop were investigated.

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Two-Phase Flow Studies in Boiling Single Channel Flow Using Wire Mesh Tomography (WMT) and Ultrasound Velocity Profile (UVP)

Volume 5: Innovative Nuclear Power Plant Design and New Technology Application; Student Paper Competition ◽

10.1115/icone22-30652 ◽

2014 ◽

Author(s):

Ari Hamdani ◽

Thang Tat Nguyen ◽

Daisuke Ito ◽

Nobuyoshi Tsuzuki ◽

Hiroshige Kikura

Keyword(s):

Velocity Profile ◽

Void Fraction ◽

Two Phase Flow ◽

Single Channel ◽

Swirling Flow ◽

Flow Behavior ◽

Wire Mesh ◽

Phase Flow ◽

Two Phase ◽

Boiling Flow

The objective of this work is to investigate characteristics of co-current boiling flow in a circular pipe with an inner diameter of 52 mm by using wire mesh tomography (WMT) and ultrasonic velocity profile (UVP). The inner wall of pipe is modified by adding fins on the inner pipe’s wall. This modification is intended to change the flow behavior into swirling flow in boiling flow. Firstly, the effect of wall modification on flow behavior is investigated by numerical calculation. Secondly, two-phase flow is investigated experimentally using UVP and WMT. In experiments, local time-average void fraction is measured using WMT and velocity profile is measured using UVP. Furthermore, these measured data, both void fraction and velocity profile, will give information about changing in flow pattern caused by modified inner pipe’s wall.

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Swirling Gas–Liquid Two-Phase Flow—Experiment and Modeling Part I: Swirling Flow Field

Journal of Fluids Engineering ◽

10.1115/1.1849253 ◽

2004 ◽

Vol 126 (6) ◽

pp. 935-942 ◽

Cited By ~ 21

Author(s):

L. Gomez ◽

R. Mohan ◽

O. Shoham

Keyword(s):

Flow Field ◽

Two Phase Flow ◽

Swirling Flow ◽

Phase Flow ◽

Centrifugal Forces ◽

Two Phase ◽

Cylindrical Cyclone ◽

Flow Experiment ◽

Core Characteristics ◽

Good Agreement

Compact cyclonic separators are based on swirling flow, whereby the phases are separated due to the centrifugal forces generated by the flow. This phenomenon is common in several compact separators used by the oil, process, and aerospace industries. The objective of this paper is to study experimentally the hydrodynamics of the continuous liquid phase under swirling two-phase flow, such as that occurring in the lower part of the Gas–Liquid Cylindrical Cyclone (GLCC©1) compact separator and develop a model to characterize it. Local LDV measurements for a swirling flow field have been analyzed and utilized to develop cyclone and pipe swirling flow field prediction correlations. The developed correlations, including the axial, tangential, and radial velocity distributions, have been tested and validated against data from other studies, showing good agreement. The velocity field correlations can be used to analyze swirling two-phase flow in cyclonic separators and pipes. In part II of this two-part paper, correlations are developed for the turbulent quantities, and core characteristics and stability for swirling two-phase flow.

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