Intermitted flow pattern modulation by outward phase separation

doi:10.3969/j.issn.0438-1157.2012.11.013

CIESC Journal ›› 2012, Vol. 63 ›› Issue (11): 3470-3477.DOI: 10.3969/j.issn.0438-1157.2012.11.013

Previous Articles Next Articles

Intermitted flow pattern modulation by outward phase separation

CHEN Hongxia¹, XU Jinliang^1,2, LI Zijin², XIE Jian², XING Feng²

1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;
2. Beijing Key Laboratory of New and Renewable Energy, North China Electric Power University, Beijing 102206, China

Received:2012-02-29 Revised:2012-05-11 Online:2012-11-05 Published:2012-11-05
Supported by:
supported by the National Natural Science Foundation of China(51106050)and the National Basic Research Program of China(2011CB710703).

新型外分液结构调控水平管间歇流流型

陈宏霞¹, 徐进良^1,2, 李子衿², 谢剑², 邢峰²

1. 华北电力大学可再生能源学院, 北京 102206;
2. 北京市新能源与可再生能源重点实验室, 华北电力大学, 北京 102206

通讯作者: 陈宏霞
作者简介:陈宏霞(1980-),女,博士,讲师。
基金资助:
国家自然科学基金项目(51106050);国家重点基础研究发展计划项目(2011CB710703)。

Abstract

Abstract: Phase transition heat exchange is widely used in heat transfer.The thick liquid film formed during phase transition is the reason for worsening condensation heat transfer.The passive phase separation concept using mesh construction on the pipe wall was proposed to modulate the flow pattern for the first time.In order to verify the novel concept,air-water two-phase flow experiment was performed.It was found that part of the liquid could be separated and removed from the pipe and the contact area between air and tube wall was increased.The length ratio of gas and liquid increased oscillatorily after multi-stage modulation,and furthermore,slug flow pattern changed to stratified flow.With the decrease of liquid velocity or the increase of gas velocity the modulation effect was enhanced.According to the result of the adiabatic two-phase flow pattern modulation,it was expected that the structure would significantly enhance phase transition heat transfer performance.

Key words: liquid separation, phase separation concept, flow pattern modulation, intermitted flow pattern

摘要： 相变传热广泛存在于换热领域,而两相流中的厚液膜是恶化相变传热的根本原因。提出在换热管壁面设计新型网状外分液结构,利用金属网进行间歇流气液非能动相分离,从而调控流型、强化传热。通过搭建空气-水水平管冷态实验台,证实当间歇流经过外分液结构时,气体在表面张力作用下被金属网孔拦截,液桥和厚液膜则被分离出换热管,使管内液相减少,气相汇聚,有效增大气相与管壁的接触概率;多级分液后气液两相长度比呈振荡上升,甚至将间歇流调控为分层流。减小液速或增大气速,分液效果越好,间歇流最终转变为分层流所需经历的外分液级数越少,预期此结构可显著提高相变传热效果。

关键词: 外分液, 相分离, 流型调控, 间歇流

CLC Number:

TK121

CHEN Hongxia, XU Jinliang, LI Zijin, XIE Jian, XING Feng. Intermitted flow pattern modulation by outward phase separation[J]. CIESC Journal, 2012, 63(11): 3470-3477.

陈宏霞, 徐进良, 李子衿, 谢剑, 邢峰. 新型外分液结构调控水平管间歇流流型[J]. 化工学报, 2012, 63(11): 3470-3477.

References 15

[1]	Cavallini A,Censi G,Col del D,Doretti L,Longo G A,Rossetto L,Zilio C.Condensation inside and outside smooth and enhanced tubes-a review of recent research[J].International Journal of Refrigeration,2003,26:373-392
[2]	Dalkilic A S,Wongwises S.Intensive literature review of condensation inside smooth and enhanced tubes[J].International Journal of Heat and Mass Transfer,2009,52:3409-3426
[3]	Graham D,Chato J C,Newell T A.Heat transfer and pressure drop during condensation of refrigerant 134a in an axially grooved tube[J].Int. J. Heat Mass Transfer,1999,42:1935-1944
[4]	Cavallini A,Del Col D,Doretti L.Heat transfer and pressure drop during condensation of refrigerants inside horizontal enhanced[J].International Journal of Refrigeration,2000,23(1):4-25
[5]	Cavallini A,Del Col D,Doretti L.A new computational procedure for heat transfer and pressure drop during refrigerant condensation inside enhanced tubes[J].Enhanced Heat Transfer,1999,6:441-456
[6]	Tang L.Empirical study of new refrigerant flow condensation inside horizontal smooth and micro-fin tubes.College Park:University of Maryland,1997
[7]	Suriyan L,Somchai W.The effects of corrugation pitch on the condensation heat transfer coefficient and pressure drop of R134a inside horizontal corrugated tube[J].International Journal of Heat Mass Transfer,2010,53:2924-2931
[8]	Smit F J,Meyer J P.R-22 and zeotropic R-22/R-142b mixture condensation in microfin high fin and twisted tape insert tubes[J].Journal of Heat Transfer,2002,124(5):912-921
[9]	Megerlin F E,Bergle A E.Augmentation of heat transfer in tubes by use of mesh and brush insert[J].Journal of Heat Transfer,1974,96:145-151
[10]	Dobson M K,Chato J C.Condensation in smooth horizontal tubes[J].Journal of Heat Transfer,1998,120:193-213
[11]	Traviss D P,Rohsenow W M.Flow regimes in horizontal two-phase flow with condensation[J].ASHRAE Trans.,1973,79:31-39
[12]	Hajal J E,Thome J R,Cavallini A.Condensation in horizontal tubes(Ⅰ):Two-phase flow pattern map[J].International Journal of Heat Mass Transfer,2003,46:3349-3363
[13]	Breber G,Palen J W,Taborek J.Prediction of horizontal tube side condensation of pure components using flow regime criteria[J].Journal of Heat Transfer,1980,120:471-476
[14]	Soliman H M.On the annular-to-wavy flow pattern transition during condensation inside horizontal tubes[J].Canada Journal of Chemical Engineering,1982,60:475-481
[15]	Peng Xiaofeng(彭晓峰),Wu Di(吴迪),Zhang Yang(张扬).High performance technology of the condenser[J].Chemical Industry and Engineering Progress(化工进展),2007,26(1):97-104

Intermitted flow pattern modulation by outward phase separation

新型外分液结构调控水平管间歇流流型

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

References 15

Related Articles 11

Recommended Articles

Metrics

Comments

[1]	Lei XING, Chunyu MIAO, Minghu JIANG, Lixin ZHAO, Xinya LI. Optimal design and performance analysis of downhole micro gas-liquid hydrocyclone [J]. CIESC Journal, 2023, 74(8): 3394-3406.
[2]	HUANG Kunteng, CHEN Jianyong, CHEN Ying, LUO Xianglong, LIANG Yingzong. Research status of vapor-liquid separation technology [J]. CIESC Journal, 2021, 72(S1): 30-41.
[3]	XU Xiaoxiao, ZHANG Shijie, LI Yi, LIU Chao. Study on phase distribution characteristics of gas-liquid two-phase flow in micro-channel flat T-junction [J]. CIESC Journal, 2021, 72(4): 2057-2064.
[4]	CHEN Hongxia, HUANG Linbin, GONG Yifei. Pressure evolution and interface movement of slug flow during micro-channel modulation process [J]. CIESC Journal, 2017, 68(8): 3030-3038.
[5]	YANG Chen, HE Hangxing. Equation-free multi-scale simulation of two-phase gas-liquid separation [J]. CIESC Journal, 2015, 66(6): 2031-2040.
[6]	HAN Bai1，LIU Yongfei2，JIN Youhai2. Effect of air exhaust from side seam on uniflow type multicyclones [J]. Chemical Industry and Engineering Progree, 2014, 33(02): 323-327.
[7]	SUN Dongliang, XU Jinliang, CHEN Qicheng, CAO Zhen. Influence of gravity on flow pattern modulation in vertical phase separation condenser tube [J]. CIESC Journal, 2013, 64(9): 3189-3197.
[8]	CHEN Hongxia1，XU Jinliang1,2, LI Zijin2, XIE Jian2, XING Feng2. Stratified flow pattern modulation by phase separation concept [J]. CIESC Journal, 2012, 63(7): 2045-2050.
[9]	MA Qingfen, HU Dapeng, HE Gaohong, HU Shijun, LIU Wenwei, XU Qiaolian, WANG Yuxin. Performance of Inner-core Supersonic Gas Separation Device with Droplet Enlargement Method [J]. , 2009, 17(6): 925-933.
[10]	SHEN Jiangnan，QIU Junhong，ZHENG Xingcun，WU Liguang，GAO Congjie. Research progress of microemulsion polymerization in preparation of separation membranes [J]. , 2008, 27(4): 515-.
[11]	ZHANG Yanhong，BAI Zhishan，ZHOU Ping，WANG Hualin. Studies in gas-liquid-solid slurry reactors [J]. , 2008, 27(10): 1551-.