| 邱庆刚.水平管外降膜流动液膜厚度数值模拟[J].,2013,53(3):359-363 |
| 水平管外降膜流动液膜厚度数值模拟 |
| Numerical simulation of falling film thickness around a horizontal tube |
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| DOI：10.7511/dllgxb201303008 |
| 中文关键词: 水平管 降膜 液膜厚度 数值模拟 |
| 英文关键词: horizontal tube falling film film thickness numerical simulation |
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| 摘要点击次数: 1046 |
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| 中文摘要: |
| 建立了水平管外液体降膜流动过程的物理数学模型并对其进行了数值模拟研究,将模拟结果与文献中的理论值和实验值做了比较,变化趋势吻合较好．通过计算不同雷诺数下沿管壁周向的液膜厚度及液膜分布情况,分析了结构和流动参数对液膜厚度与分布的影响规律．结果表明:液膜厚度随雷诺数的增大而增大；当雷诺数一定时,〖JP3〗管壁周向液膜厚度呈先减小后增大趋势并随管间距的增大而减小,并且随着雷诺数的增大,管壁周向液膜波动增大且易出现“干区”． |
| 英文摘要: |
| A numerical study of liquid falling film outside a horizontal tube is performed by establishing a mathematics physics model. And the simulation results fit well with the experimental ones. The film thickness and the film distribution at different Reynolds numbers are computed to analyze the influence of structural and flow parameters on the film thickness and the film distribution. The experimental results show that the film thickness increases with the film Reynolds number increasing. The film thickness around the tube firstly decreases, and then increases at a certain Reynolds number. The film thickness decreases with the increase of the tube pitch, and with the increase of the Reynolds number the film becomes more fluctuated and dryout region easily appears. |
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