An Investigation on the Void Fraction for upward Gas-Liquid Slug Flow in Vertical Pipe

• RESEARCH NOTES • Previous Articles Next Articles

An Investigation on the Void Fraction for upward Gas-Liquid Slug Flow in Vertical Pipe

XIA Guodong^a; ZHOU Fangde^b; HU Mingsheng^b

^a College of Environmental and Energy Engineering, Beijing Polytechnic University, Beijing
100022, China
^b State Key Laboratory of Multiphase Flowin Power Engineering, Xi’an Jiaotong University,
Xi’an 710049, China

Received:1900-01-01 Revised:1900-01-01 Online:2001-12-28 Published:2001-12-28
Contact: XIA Guodong

垂直管内气液两相弹状流含气率研究

夏国栋^a; 周芳德^b; 胡明胜^b

^a College of Environmental and Energy Engineering, Beijing Polytechnic University, Beijing
100022, China
^b State Key Laboratory of Multiphase Flowin Power Engineering, Xi’an Jiaotong University,
Xi’an 710049, China

通讯作者: 夏国栋

Abstract

Abstract: In order to investigate the influence of the entrance effect on the spatial distribution of
phases, the experiments on gas-liquid two-phase slug flow in a vertical pipe of 0.03m ID
were carried out by using optical probes and an EKTAPRO 1000 high speed motion analyzer. It
demonstrates that the radial profile of slug flow void fraction is parabolic. Influenced by
the falling liquid film, the radial profile curve of liquid slug void fraction in the wake
region is also parabolic. Since fully turbulent velocity distribution is built up in the
developed region,the void fraction profile in this region is the saddle type. At given
superficial liquid velocity, the liquid slug void fraction increases with gas velocity. The
radial profiles of liquid slug void fraction at different axial locations are all saddle
curves, but void fraction is obviously high around the centerline in the entrance region.
The nearer the measuring station is from the entrance, the farther the peak location is
away from the wall.

Key words: gas-liquid slug flow, void fraction, vertical pipe

摘要： In order to investigate the influence of the entrance effect on the spatial distribution of
phases, the experiments on gas-liquid two-phase slug flow in a vertical pipe of 0.03m ID
were carried out by using optical probes and an EKTAPRO 1000 high speed motion analyzer. It
demonstrates that the radial profile of slug flow void fraction is parabolic. Influenced by
the falling liquid film, the radial profile curve of liquid slug void fraction in the wake
region is also parabolic. Since fully turbulent velocity distribution is built up in the
developed region,the void fraction profile in this region is the saddle type. At given
superficial liquid velocity, the liquid slug void fraction increases with gas velocity. The
radial profiles of liquid slug void fraction at different axial locations are all saddle
curves, but void fraction is obviously high around the centerline in the entrance region.
The nearer the measuring station is from the entrance, the farther the peak location is
away from the wall.

关键词: 垂直管;气液两相弹状流;含气率;空隙度;化学工业;流体力学

XIA Guodong, ZHOU Fangde, HU Mingsheng. An Investigation on the Void Fraction for upward Gas-Liquid Slug Flow in Vertical Pipe[J]. .

夏国栋, 周芳德, 胡明胜. 垂直管内气液两相弹状流含气率研究[J]. CIESC Journal.

[1]	Qichao LIU, Yunlong ZHOU, Cong CHEN. Analysis and calculation of void fraction of gas-liquid two-phase flow in vertical riser under fluctuating vibration [J]. CIESC Journal, 2023, 74(6): 2391-2403.
[2]	Teng WANG, Qincheng BI, Miao GUI, Zhaohui LIU. Experimental study on void fraction distribution in liquid slug of vertical upward slug flow [J]. CIESC Journal, 2021, 72(9): 4584-4593.
[3]	Jie CHENG, Yajun GUO, Teng WANG, Miao GUI, Zhaohui LIU, Zhiqiang SUI. Void fraction distribution of vapor-water two-phase flow in vertical tube bundles using gamma densitometer [J]. CIESC Journal, 2019, 70(4): 1375-1382.
[4]	ZHAO Ning, WANG Peipei, GUO Suna, FANG Lide, WANG Dongxing, CHEN Xue. Interfacial disturbance wave velocity of gas-liquid two-phase annular flow in vertical pipe [J]. CIESC Journal, 2018, 69(7): 2926-2934.
[5]	CAI Bo, XIA Guodong, JIA Yuting, ZHOU Yanzhao, ZONG Luxiang. Local void fraction distribution of gas-liquid two-phase flow in rectangular helically coiled channel [J]. CIESC Journal, 2018, 69(6): 2474-2480.
[6]	YAN Chaoxing, YAN Changqi, SUN Licheng, XING Dianchuan, LIU Guoqiang. Characteristics of void fraction distribution of bubbly flow in inclined channels [J]. CIESC Journal, 2014, 65(3): 855-861.
[7]	LI Chunfang, ZHU Chunying, FU Taotao, GAO Xiqun, MA Youguang, LIU Dongzhi. Void fraction and pressure drop of gas-liquid two-phase flow accompanied with chemical absorption in microchannel [J]. CIESC Journal, 2013, 64(9): 3175-3181.
[8]	XU Ying, CHEN Yang, BA Xili, YIN Cun, ZHANG Tao, SHI Hongran. Over-reading prediction model of wet gas measurement using Z-shaped gas ultrasonic flow meter [J]. CIESC Journal, 2013, 64(11): 4031-4038.
[9]	CHEN Lei, BAO Yuyun, GAO Zhengming. Void Fraction Distributions in Cold-gassed and Hot-sparged Three Phase Stirred Tanks with Multi-impeller [J]. , 2009, 17(6): 887-895.
[10]	GU Hanyang, GUO Liejin. Experimental Investigation of Slug Development on Horizontal Two-phase Flow [J]. , 2008, 16(2): 171-177.
[11]	YUN Junxian, SHEN Ziqiu, MING Pingwen. Wall-liquid mass transfer for Taylor bubbles rising through liquid in a vertical tube [J]. , 2002, 10(4): 404-410.
[12]	XIA Sulan, ZHU Jiahua, Hu Xinhui. Study on Liquid-Phase Axial Dispersion in Converging Taper Liquid-Solid Fluidized Beds [J]. , 2000, 2(2): 134-139.
[13]	CHEN Yuanming, BellK., Kottowski H.M.. THE EFFECT OF LIQUID PHYSICAL PROPERTIES ON DRIFT VELOCITY [J]. , 1992, 7(1): 8-18.