竖直管外气液逆流环状降膜速度与温度分布

doi:10.3969/j.issn.0438-1157.2013.11.004

化工学报 ›› 2013, Vol. 64 ›› Issue (11): 3903-3909.DOI: 10.3969/j.issn.0438-1157.2013.11.004

竖直管外气液逆流环状降膜速度与温度分布

郑晓军, 刘人滔, 朱家骅, 夏素兰, 王子宁

四川大学化学工程学院, 四川成都 610065

收稿日期:2013-04-04 修回日期:2013-07-06 出版日期:2013-11-05 发布日期:2013-11-05
通讯作者: 朱家骅
作者简介:郑晓军(1988-),男,硕士研究生。
基金资助:
国家自然科学基金项目(21276161);中央高校基本科研专项(2010SCU22008)。

Velocity and temperature profiles in annular falling films outside vertical tube with counter-current gas flow

ZHENG Xiaojun, LIU Rentao, ZHU Jiahua, XIA Sulan, WANG Zining

School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China

Received:2013-04-04 Revised:2013-07-06 Online:2013-11-05 Published:2013-11-05
Supported by:
supported by the National Natural Science Foundation of China(21276161)and the Central University Fundamentals Research Plan(2010SCU22008).

摘要/Abstract

摘要： 建立了竖直管外环状降膜气液逆流传热传质条件下稳态层流降膜一维速度分布和二维温度分布模型,以及膜厚和降膜表面热通量的数值计算方法。表面热通量的模型计算值与实验值在气体Reynolds数Re_g<1200的范围内吻合较好,表明基于界面摩擦因子求解模型的方法在两相均为层流条件下是可靠的。模型显示了降膜速度分布和温度分布的非线性特征,降膜表面附近陡降的温度梯度表明,减小膜厚是强化降膜传热传质过程的有效途径。

关键词: 气液两相流, 环状降膜, 速度分布, 温度分布, 非线性特征

Abstract: A theoretical model was derived for the steady state one-dimensional velocity distribution and two-dimensional temperature distributions in annular laminar liquid films falling down on the wall outside a vertical tube with heat and mass transferring from the interface to counter-current gas flow.Based on the model,liquid film thickness and interfacial heat flux could be predicted if shear stress was obtained.From the good agreement of experimental data and predicted values of the interfacial heat fluxes within the range of gas flow Reynolds number Re_g<1200,the method of using interfacial friction factor to solve the model was reliable under laminar conditions of the two phases.The model simulation results revealed the non-linear characteristics of velocity and temperature distributions in the film.The sharp temperature gradient close to the gas-liquid interface indicated that it was an effective way to enhance heat and mass transfer by reducing film thickness.

Key words: gas-liquid two-phase flow, annular falling films, velocity distribution, temperature distribution, non-linear characteristics

中图分类号:

TQ021

郑晓军, 刘人滔, 朱家骅, 夏素兰, 王子宁. 竖直管外气液逆流环状降膜速度与温度分布[J]. 化工学报, 2013, 64(11): 3903-3909.

ZHENG Xiaojun, LIU Rentao, ZHU Jiahua, XIA Sulan, WANG Zining. Velocity and temperature profiles in annular falling films outside vertical tube with counter-current gas flow[J]. CIESC Journal, 2013, 64(11): 3903-3909.

参考文献 15

[1]	Bird R B,Stewart W E,Lightfoot E N.Transport Phenomena[M].New York:Wiley,2006
[2]	Zhou Yuanyuan,Yu Jianlin,Li Yanzhong.A study on flow and heat transfer characteristics for saturated falling-film evaporation of liquid oxygen in a vertical channel[J].International Journal of Heat and Mass Transfer,2012,55:7218-7222
[3]	O Bana Ei Ro.Design Handbook of Heat Exchanger(热交换器设计手册)[M].Xu Zhongquan(徐中权),trans. Beijing:Petrochemical Press,1984
[4]	Luo Chao,Ma Weibin,Gong Yulie.Design of single vertical tube falling film evaporator base on experiment[J].Journal of Loss Prevention in the Process Industries,2011,24:695-698
[5]	Zhang Zhibing(张志炳),Geng Jiao(耿皎),Zhang Feng(张锋),et al.Marangoni effect and vapour-liquid mass transfer process[J].Journal of Chemical Industry and Engineering (China)(化工学报),2003,54(4):508-515
[6]	Azizi Y,Benhamou B,Galanis N,El-Ganaoui M. Buoyancy effects on upward and downward laminar mixed convection heat and mass transfer in a vertical channel[J].International Journal of Numerical Methods for Heat & Fluid Flow,2007,17(3):333-353
[7]	Palen J W,Wang Q,Chen J C.Falling film evaporation of binary mixtures[J].AIChE Journal,1994,40(2):207-214
[8]	Zhang Feng,Tang Donglei,Geng Jiao,Wang Zhixiang,Zhang Zhibing.Study on the temperature distribution of heated falling liquid films[J].Physica D,2008,237:867-872
[9]	Hewitt J G.Two-Phase Flow and Heat Transfer[M].London:Oxford Press, 1978
[10]	Gu Datian(古大田),Zhu Jiahua(朱家骅).A technique for measuring dynamic liquid film thickness[J].Journal of Chemical Industry and Engineering(China)(化工学报),1988(3):374-377
[11]	Zhu Jiahua(朱家骅),Liu Rentao(刘人滔),Zheng Xiaojun(郑晓军),et al.Elastic wall distributor of outer annular falling film with changing thickness[P]:ZL,201310096821.5.2013-05-25
[12]	Liu Yuan(刘渊).Error Theory and Data Processing(误差理论与数据处理)[M].Dalian:Dalian University of Technology,2008
[13]	Liu Rentao(刘人滔).Elastic wall distributor of outer annular falling film and its ultra-thin characteristics[D].Chengdu:Sichuan University,2013
[14]	Liu Guangqi(刘光启).Nomographic Handbook of Chemical Physical Properties(化工物性算图手册)[M].Qingdao:Qingdao University of Science and Technology,2002
[15]	Ye Shichao(叶世超),Xia Sulan(夏素兰),Yi Meigui(易美桂),et al.Principles of Chemical Engineering(化工原理)[M].Beijing:Science Press,2006

竖直管外气液逆流环状降膜速度与温度分布

Velocity and temperature profiles in annular falling films outside vertical tube with counter-current gas flow

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