传热管异径布管方式传热系数的数值分析

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Numerical Analysis of Heat-Transfer Coefficient of Different Diameter Thermo-Tube and Disposal Mode

摘要: 针对管壳式换热器,提出一种新的异径管布管方式。运用CFD软件分析了该结构在流量降低时对管侧传热系数的数值影响;得出随着流量的变化,大小管道内流量速度分配变化率有明显不同,且变化率并与管长有关,并在一定的流速范围内,小管抵抗传热系数降低的趋势较为显著。
- 传热管 /
- 异径布置 /
- 传热系数 /
- 数值模拟
Abstract: For the shell-tube heat exchanger a novel tube arrangement of diameter reducing is presented in the paper.The effect of flow reduction on heat transfer in the inner side of the tubes is studied by CFD.The results show that flow flux disperses in tubes with different diameters and the difference is related to the length of the tube.The heat transfer deterioration in a thin tube is not obviously as that in a big one with a certain velocity range.
- Thermo-tube /
- Reduced tube layout /
- Coefficient of heat transfer /
- Numerical simulation