矩形截面螺旋管内气液两相流型转换数值模拟

doi:10.3969/j.issn.0438-1157.2014.12.017

化工学报 ›› 2014, Vol. 65 ›› Issue (12): 4767-4774.DOI: 10.3969/j.issn.0438-1157.2014.12.017

矩形截面螺旋管内气液两相流型转换数值模拟

周云龙, 张立彦

东北电力大学能源与动力工程学院, 吉林省吉林市 132012

收稿日期:2014-05-20 修回日期:2014-08-25 出版日期:2014-12-05 发布日期:2014-12-05
通讯作者: 张立彦
基金资助:
国家自然科学基金项目(51276033).

Numerical simulation of flow pattern transition for gas-liquid two-phase flow in helical square ducts

ZHOU Yunlong, ZHANG Liyan

School of Energy and Power Engineering, Northeast Dianli University, Jilin 132012, Jilin, China

Received:2014-05-20 Revised:2014-08-25 Online:2014-12-05 Published:2014-12-05
Supported by:
supported by the National Natural Science Foundation of China (51276033).

摘要/Abstract

摘要： 采用CLSVOF(coupled level set and volume of fluid method)方法,以空气和水为介质对矩形截面螺旋管内气液两相流动进行数值模拟,气相折算速度U_G为0.1～2.5 m·s^-1,液相折算速度U_L为0.09～4.5 m·s^-1.研究螺旋直径、螺旋升角对流型转换边界的影响,并绘制了不同螺旋直径、不同螺旋升角下的流型图.数值结果表明,与传统VOF方法相比,CLSVOF可以得到更精确的相界面;随着螺旋升角的增加,塞状流向泡状流的转换边界向U_L减小的方向进行,但是幅度很小,塞状流向弹状流的转换边界向U_L减小的方向进行;随着螺旋直径的增加,塞状流向泡状流的转换边界向U_L减小的方向进行,塞状流向弹状流的转换边界向U_L减小、U_G增大的方向进行;与Murai流型图相比,流型转换边界有所差异.

关键词: 螺旋管, 气液两相流, CLSVOF模型, 数值模拟, 计算流体力学

Abstract: A numerical analysis of air-water two-phase flow characteristics in helical square ducts was made using the CLSVOF (coupled level set and volume of fluid) multiphase model. The range of gas superficial velocity was 0.1—2.5 m·s^-1, and liquid superficial velocity was 0.09—4.5 m·s^-1. An investigation of effects of curvature diameter and helix angle on flow pattern transition was made. The air-liquid two-phase flow pattern map was drafted under different flow conditions. Compared with the traditional interface tracking method, the CLSVOF method could get a more accurate gas-liquid interface. With helix angle increasing, the conversion boundary from plug flow to bubbly flow moved towards decreasing U_L, but only slightly. The conversion boundary from plug flow to slug flow moved towards decreasing U_L. With coil diameter increasing, the conversion boundary from plug flow to bubbly flow moved towards decreasing U_L. The conversion boundary from plug flow to slug flow moved towards decreasing U_Land increasing U_G. Flow pattern transition was different from Murai flow pattern.

Key words: helical ducts, gas-liquid flow, CLSVOF model, numerical simulation, computational fluid dynamics

中图分类号:

TK121

周云龙, 张立彦. 矩形截面螺旋管内气液两相流型转换数值模拟[J]. 化工学报, 2014, 65(12): 4767-4774.

ZHOU Yunlong, ZHANG Liyan. Numerical simulation of flow pattern transition for gas-liquid two-phase flow in helical square ducts[J]. CIESC Journal, 2014, 65(12): 4767-4774.

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矩形截面螺旋管内气液两相流型转换数值模拟

Numerical simulation of flow pattern transition for gas-liquid two-phase flow in helical square ducts

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