| 矩形截面螺旋管内气液两相流型转换数值模拟 |
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| 引用本文： | 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. DOI: 10.3969/j.issn.0438-1157.2014.12.017 |
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| 作者姓名： | 周云龙 张立彦 |
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| 作者单位： | 东北电力大学能源与动力工程学院, 吉林省 吉林市 132012 |
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| 基金项目： | 国家自然科学基金项目(51276033)。@@@@supported by the National Natural Science Foundation of China |
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| 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UG为0.1～2.5 m·s-1,液相折算速度UL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UL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UL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UL减小的方向进行,塞状流向弹状流的转换边界向UL减小、UG增大的方向进行;与Murai流型图相比,流型转换边界有所差异.
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| 关 键 词： | 螺旋管 气液两相流 CLSVOF模型 数值模拟 计算流体力学 |
| 收稿时间： | 2014-05-20 |
| 修稿时间： | 2014-08-25 |
Numerical simulation of flow pattern transition for gas-liquid two-phase flow in helical square ducts |
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| ZHOU Yunlong,ZHANG Liyan. Numerical simulation of flow pattern transition for gas-liquid two-phase flow in helical square ducts[J]. Journal of Chemical Industry and Engineering(China), 2014, 65(12): 4767-4774. DOI: 10.3969/j.issn.0438-1157.2014.12.017 |
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| Authors: | ZHOU Yunlong ZHANG Liyan |
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| Affiliation: | School of Energy and Power Engineering, Northeast Dianli University, Jilin 132012, Jilin, China |
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| 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 UL, but only slightly. The conversion boundary from plug flow to slug flow moved towards decreasing UL. With coil diameter increasing, the conversion boundary from plug flow to bubbly flow moved towards decreasing UL. The conversion boundary from plug flow to slug flow moved towards decreasing UL and increasing UG. Flow pattern transition was different from Murai flow pattern. |
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| Keywords: | helical ducts gas-liquid flow CLSVOF model numerical simulation computational fluid dynamics |
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