| Condensation heat transfer characteristics of vapor flow in vertical small-diameter tube with variable wall temperature |
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| 引用本文： | 杜小泽,王补宣. Condensation heat transfer characteristics of vapor flow in vertical small-diameter tube with variable wall temperature[J]. 中国科学E辑(英文版), 2002, 45(1): 81-89. DOI: 10.1360/02ye9010 |
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| 作者姓名： | 杜小泽 王补宣 |
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| 作者单位： | DU Xiaoze & WANG BuxuanThermal Engineering Department，Tsinghua University，Beijing 100084，China |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China (Grant No. 59995550-3) . |
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| 摘 要： | To explore the condensation characteristics of vapor flow inside vertical small-diameter tubes, the classical Nusselt theory is revised and an analytical model with variable tube wall temperature is established by considering the effect of surface tension exerted by condensate film bending as well as the effect of shear stress on vapor-liquid interface. The effects of various factors including tube wall temperature and gravity on flow condensation in small-diameter tubes are analyzed theoretically to show the heat transfer characteristics. Comparison with the experimental data indicates that the proposed analytical model is fit to reveal the fundamental characteristics of flow condensation heat transfer in vertical small-diameter tube.
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| 收稿时间： | 2004-02-19 |
Condensation heat transfer characteristics of vapor flow in vertical small-diameter tube with variable wall temperature |
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| Xiaoze Du and Buxuan Wang. Condensation heat transfer characteristics of vapor flow in vertical small-diameter tube with variable wall temperature[J]. Science in China(Technological Sciences), 2002, 45(1): 81-89. DOI: 10.1360/02ye9010 |
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| Authors: | Xiaoze Du and Buxuan Wang |
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| Affiliation: | Thermal Engineering Department,Tsinghua University,Beijing 100084,China |
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| Abstract: | To explore the condensation characteristics of vapor flow inside vertical small-diameter tubes, the classical Nusselt theory is revised and an analytical model with variable tube wall temperature is established by considering the effect of surface tension exerted by condensate film bending as well as the effect of shear stress on vapor-liquid interface. The effects of various factors including tube wall temperature and gravity on flow condensation in small-diameter tubes are analyzed theoretically to show the heat transfer characteristics. Comparison with the experimental data indicates that the proposed analytical model is fit to reveal the fundamental characteristics of flow condensation heat transfer in vertical small-diameter tube. |
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| Keywords: | small-diameter tube flow condensation heat transfer characteristics. |
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