竖直上升气液泡状流数学模型封闭的研究

doi:10.16085/j.issn.1000-6613.2016.10.006

化工进展 ›› 2016, Vol. 35 ›› Issue (10): 3049-3056.DOI: 10.16085/j.issn.1000-6613.2016.10.006

竖直上升气液泡状流数学模型封闭的研究

周强, 郭晓峰, 李军, 王腾, 陈彩霞

华东理工大学资源与环境工程学院, 煤气化及能源化工教育部重点实验室, 上海 200237

收稿日期:2016-03-11 修回日期:2016-05-13 出版日期:2016-10-05 发布日期:2016-10-05
通讯作者: 陈彩霞,教授,博士生导师,研究方向为多相流体力学。E-mail:cxchen@ecust.edu.cn
作者简介:周强(1991-),男,硕士,研究方向为多相流模拟。
基金资助:
国家自然科学基金项目（21276085）。

Comparative investigation on closure models for the simulation of vertical gas-liquid bubbly upflow

ZHOU Qiang, GUO Xiaofeng, LI Jun, WANG Teng, CHEN Caixia

Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2016-03-11 Revised:2016-05-13 Online:2016-10-05 Published:2016-10-05

摘要/Abstract

摘要： 竖直上升管气液两相流广泛应用于相变传热、核反应堆等工业过程。本文以竖直上升气液两相流为研究对象，运用欧拉双流体模型，针对表观液速为0.45m/s、表观气速分别为0.015m/s和0.1m/s的泡状流数值模拟过程中的升力、壁面润滑力、湍流扩散力、气泡诱导湍流（BIT）等封闭模型，开展数值模拟比较研究。模拟发现：①低气速泡状流中，升力和壁面润滑力的同时加入能够改善壁面附近的气含率，气泡在这两个力作用下在径向上达到一个相对平衡，得到与实验气含率类似的壁面峰，模拟的液相速度较合理；低气速时，BIT的影响可以忽略。②高气速泡状流中，BIT对气-液两相流的模拟结果影响比较明显，湍动耗散源项的加入能使液速分布的模拟结果得到改善，Troshko模型相对Sato模型更能反映气泡诱导湍流对液相湍流的作用。③高气速时升力的引入使气含率产生壁面峰，加入湍流扩散力能使峰值略微降低，但仍没有解决高气速时引入升力出现的气含率壁面峰问题，说明在径向上湍流扩散力还不足以抵抗升力。

关键词: 气-液两相流, 泡状流, 气泡诱导湍流, 升力, 壁面润滑力

Abstract: Gas-liquid upflow in vertical pipes was widely used in the phase change heat transfer and nuclear reactors. In this paper,the Euler-Euler two-fluid model was applied in the simulation of the gas-liquid upflow with the emphasis on the selections of the closure models. The lift force,wall lubrication force,turbulent dispersion force and bubble induced turbulence(BIT) were studied at a superficial liquid velocity 0.45m/s and superficial gas velocities,0.015m/s and 0.1m/s,respectively. The simulation results showed that:①At low superficial gas velocity,the near wall gas holdup can be optimized with both the lift force and wall lubrication force taken into account. The bubbles reached a relative balance under the effect of this two forces with the result of wall peak of gas fraction and the reasonable simulated liquid velocity;The effect of BIT can be negligible at low superficial gas velocity. ②At high superficial gas velocity bubbly flows,the influence of BIT on the simulation results of gas-liquid two phase flow was evident. The simulation results can be improved with the turbulence dissipation source term included,and Troshko model prevailed over Sato model in describing the effect of bubble induced turbulence on the liquid turbulence. ③At high superficial gas velocity,the wall peak of gas holdup occurred with the lift force included,then the peak value can be reduced after the turbulent dispersion force taken into account. While the issue of wall peak still can't be solved,indicating that turbulence dispersion force was not strong enough to overcome the lift force.

Key words: gas-liquid two phase flow, bubbly flow, bubble induced turbulence(BIT), lift force, wall lubrication force

中图分类号:

O359.1

周强, 郭晓峰, 李军, 王腾, 陈彩霞. 竖直上升气液泡状流数学模型封闭的研究[J]. 化工进展, 2016, 35(10): 3049-3056.

ZHOU Qiang, GUO Xiaofeng, LI Jun, WANG Teng, CHEN Caixia. Comparative investigation on closure models for the simulation of vertical gas-liquid bubbly upflow[J]. Chemical Industry and Engineering Progree, 2016, 35(10): 3049-3056.

参考文献

[1] LIAO Y,LUCAS D.Investigations on bubble-induced turbulence modeling for vertical pipe bubbly flows[C]//201220th International Conference on Nuclear Engineering and the ASME 2012 Power Conference.American Society of Mechanical Engineers,2012:519-527.
[2] 庞明军,徐一丹,魏进家.管道泡状流相分布模式和分布机理研究进展[J].化工进展,2014,33(11):2829-2842.
[3] TOMIYAMA A,TAMAI H,ZUN I,et al.Transverse migration of single bubbles in simple shear flows[J].Chem.Eng.Sci.,2002,57:1849-1858.
[4] SHAWKAT M E,Ching C Y,Shoukri M.Bubble and liquid turbulence characteristics of bubbly flow in a large diameter vertical pipe[J].International Journal of Multiphase Flow,2008,34(8):767-785.
[5] LUCAS D,KREPPER E,PRASSER H M.Prediction of radial gas profiles in vertical pipe flow on the basis of bubble size distribution[J].International Journal of Thermal Sciences,2001,40(3):217-225.
[6] 王晓冬,张孜博,屠基元.垂直上升圆管内等温泡状流的数值模拟[J].力学学报,2008,40(4):441-446.
[7] OHNUKI A,AKIMOTO H.Experimental study on transition of flow pattern and phase distribution in upward air-water two-phase flow along a large vertical pipe[J].International journal of multiphase flow,2000,26(3):367-386.
[8] 孙波,孙立成,幸奠川,等.竖直大圆管内两相流界面分布机理[J].化工学报,2012,63(12):3812-3817.
[9] 李兆奇,王丽军,管小平,等.基于径向力平衡的鼓泡塔二维流体力学模型[J].化工学报,2014,65(11):4222-4230.
[10] ANTAL S P,LAHEY R T,FLAHERTY J E.Analysis of phase distribution in fully developed laminar bubbly two-phase flow[J].International Journal of Multiphase Flow,1991,17(5):635-652.
[11] TOMIYAMA A.Struggle with computational bubble dynamics[J].Multiphase Science and Technology,1998,10(4):369-405.
[12] HOSOKAWA S,TOMIYAMA A,MISAKI S,et al.Lateral migration of single bubbles due to the presence of wall[C]//ASME 2002 Joint US-European Fluids Engineering Division Conference.American Society of Mechanical Engineers,2002:855-860.
[13] 韩朋飞,郭烈锦,程兵.泡状流三维模拟及壁面润滑力模型比较[J].工程热物理学报,2014(10):1979-1983.
[14] HOSOKAWA S,TOMIYAMA A.Bubble-induced pseudo turbulence in laminar pipe flows[J].International Journal of Heat and Fluid Flow,2013,40:97-105.
[15] 李希,李兆奇,管小平,等.气液鼓泡塔流体力学研究进展[J].高校化学工程学报,2015,29(4):765-779.
[16] SATO Y,Sekoguchi K.Liquid velocity distribution in two-phase bubble flow[J].International Journal of Multiphase Flow,1975,2(1):79-95.
[17] TROSHKO A A,HASSAN Y A.A two-equation turbulence model of turbulent bubbly flows[J].International Journal of Multiphase Flow,2001,27(11):1965-2000.
[18] XU L,YUAN B,NI H,et al.Numerical simulation of bubble column flows in churn-turbulent regime:comparison of bubble size models[J].Ind.Eng.Chem.Res.,2013,52(20):6794-6802.
[19] 李倩,程景才,杨超,等.群体平衡方程在搅拌反应器模拟中的应用[J].化工学报,2014,65(5):1607-1615.
[20] ISHⅡ M,ZUBER N.Drag coefficient and relative velocity in bubbly,droplet or particulate flows[J].AIChE J.,1979,25(5):843-855.
[21] FRANK T,SHI J,BURNS A D.Validation of Eulerian multiphase flow models for nuclear safety application[C]//Proceeding of the Third International Symposium on Two-Phase Modelling and Experimentation,Pisa,Italy.2004.
[22] BURNS A D,FRANK T,HAMILL I,et al.The Favre averaged drag model for turbulent dispersion in Eulerian multi-phase flows[C]//5th International Conference on Multiphase Flow,ICMF,2004,4:1-17.
[23] ANSYS Inc..ANSYS FLUENT-15.0 Theory Guide[M].2013.

竖直上升气液泡状流数学模型封闭的研究

Comparative investigation on closure models for the simulation of vertical gas-liquid bubbly upflow

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 3

编辑推荐

Metrics

本文评价

[1]	陈蔚阳, 宋欣, 殷亚然, 张先明, 朱春英, 付涛涛, 马友光. 矩形微通道内液相黏度对气泡界面的作用机制[J]. 化工进展, 2023, 42(7): 3468-3477.
[2]	付玮琪, 赵子贤, 于璟, 魏伟, 王志远, 黄炳香. 泡状流中水合物生成预测模型及实验[J]. 化工进展, 2022, 41(11): 5746-5754.
[3]	庞明军1，2，徐一丹1，魏进家2. 管道泡状流相分布模式和分布机理研究进展[J]. 化工进展, 2014, 33(11): 2829-2842.