Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Печать: 0276-1459
ISSN Онлайн: 1943-6181

Выпуски:
Том 31, 2019 Том 30, 2018 Том 29, 2017 Том 28, 2016 Том 27, 2015 Том 26, 2014 Том 25, 2013 Том 24, 2012 Том 23, 2011 Том 22, 2010 Том 21, 2009 Том 20, 2008 Том 19, 2007 Том 18, 2006 Том 17, 2005 Том 16, 2004 Том 15, 2003 Том 14, 2002 Том 13, 2001 Том 12, 2000 Том 11, 1999 Том 10, 1998 Том 9, 1997 Том 8, 1994 Том 7, 1993 Том 6, 1992 Том 5, 1990 Том 4, 1989 Том 3, 1987 Том 2, 1986 Том 1, 1982

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v17.i1-2.80
pages 147-168

EXPERIMENTAL AND ANALYTICAL STUDIES OF GAS ENTRAINMENT PHENOMENA IN SLUG FLOW IN HORIZONTAL AND NEAR HORIZONTAL PIPES

Colin P. Hale
Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
Geoffrey F. Hewitt
Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
I. G. Manolis
Dept. of Chemical Engineering, Imperial College, London, UK
M. A. Mendes
Department of Chemical Engineering and Chemical Technology, Imperial College London, South Kensington Campus, London SW72AZ, UK
S. M. Richardson
Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
W. L. Wong
EPTG Pipelines Team, BP Exploration, Sunbury-on-Thames, TW16 7LN, UK

Краткое описание

For analysing cases of slug flow in which the slug body contains gas bubbles, a common assumption is that the liquid and gas enter the slug to form a homogeneous mixture which passes through the slug and discharges at the tail. The liquid holdup in the slug calculated by this assumption is simply the ratio of the liquid volume flowrate entering the slug divided by the sum of the gas and liquid flowrates entering the slug.
In this paper the validity of the homogeneous assumption in the prediction of the liquid holdup within the slug body has been examined by conducting several campaigns of experiments in horizontal and 1° upwardly inclined test-sections. A special ("push-in") experiment is also described which allows an objective measurement of the gas entrainment rate.
Comparisons between the predictions of the homogeneous "unit cell" model and the experimental data showed good agreement at superficial mixture velocities above 6 ms1. However, the model under-predicts the experimental holdup values at lower superficial mixture velocities. Gamma tomographic measurements of gas content distributions in the liquid slugs show that the gas tends to separate towards the top of the tube at lower flowrate. A two-fluid type model for the slug body is described for a stratified flow consisting of a bubbly layer at the top of the tube flowing over a pure liquid layer at the bottom. This appears to match the experimental observations.


Articles with similar content:

CONDENSATION INSIDE A VERTICAL TUBE
International Heat Transfer Conference 7, Vol.11, 1982, issue
G. M. Lilburne, D.G. Wood
HEAT TRANSFER IN HORIZONTAL SLUG FLOW
International Heat Transfer Conference 10, Vol.16, 1994, issue
V.V. Wadekar, Geoffrey F. Hewitt, G. Sun
Experimental Study of Particle Size, Sound Velocity, and Resonance Phenomena in a Two-Phase Foam Flow
Heat Transfer Research, Vol.32, 2001, issue 4-6
Yu. A. Sevast'yanov, S. I. Vainshtein, I. V. An, A. V. Sidnev, A. P. Sevast'yanov, M. M. Grishutin
PRESSURE DROP FOR CONDENSATION OF A PURE VAPOUR IN DOWN FLOW IN A VERTICAL TUBE
International Heat Transfer Conference 7, Vol.11, 1982, issue
D. J. Pulling, R. G. Sardesai, R. G. Owen
5.5.16 Thermophysical properties at critical and supercritical pressures
Heat Exchanger Design Updates, Vol.12, 2005, issue 2
I. L. Pioro