Experimental investigation of falling film evaporation on horizontal tubes
Experimental investigation of falling film evaporation on horizontal tubes
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DOI：
10.1002/(sici)1520-6556(1998)27:8
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发表时间：
1996-10
期刊：
影响因子：
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通讯作者：
Y. Fujita;M. Tsutsui
中科院分区：
文献类型：
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作者：
Y. Fujita;M. Tsutsui
本文介绍了水平管外液膜蒸发传热的实验研究结果。使用25 mm外径进行实验。铜管由内部电加热筒加热，从而在管外表面上产生均匀的热通量。将五根加热管以50 mm的间距排列在垂直平面上。通过进料管将预热至0.2 MPa饱和温度的氟利昂R-11供应至最顶部的加热管。在膜雷诺数为10 ~ 2000的范围内，对每根加热管的传热特性进行了研究，并给出了关联式。还考虑了由于膜破裂而引起的传热恶化。© 1999 Scripta Technica，Inc. Heat Trans Jpn Res，27（8）：609-618，1998
This paper presents the results of an experimental investigation relating to heat transfer during evaporation of thin liquid films falling over horizontal tubes. Experiments were conducted using 25 mm o.d. copper tubes heated by internal electrical cartridge heaters so that a uniform heat flux was generated on the outside tube surface. Five heated tubes were arrayed on a vertical plane with a pitch of 50 mm. Freon R-11 preheated to the saturation temperature at 0.2 MPa was supplied to the topmost heated tube through feeding tubes. Heat transfer characteristics on each heated tube were clarified in a range of film Reynolds number from 10 to 2000 and the measured data are presented in the form of correlations. Deterioration of heat transfer due to film break down was also considered. © 1999 Scripta Technica, Inc. Heat Trans Jpn Res, 27(8): 609–618, 1998