Experimental Study on Heat Transfer of Heated Falling Film Under Gas-Liquid Cross-Flow Condition

被引：2

作者：

Jiang, Bin ^{[1
]}

Wang, Ziyun ^{[2
]}

Fu, Xiangzhao ^{[3
]}

Wang, Yong ^{[3
]}

机构：

[1] Southwest Univ Sci & Technol, Sch Civil Engn & Architecture, Mianyang 621010, Peoples R China

[2] Sichuan Univ, Coll Architecture & Environm, Chengdu 610064, Peoples R China

[3] Chongqing Univ, MOE Key Lab Gorges Reservoir Reg Ecoenvironm 3, Chongqing 630044, Peoples R China

来源：

HEAT TRANSFER ENGINEERING | 2014年 / 35卷 / 01期

关键词：

TURBULENT MIXED CONVECTION; MASS-TRANSFER; TEMPERATURE DISTRIBUTION; VERTICAL CHANNEL; EVAPORATION; HYDRODYNAMICS; DIFFUSION; THICKNESS; DYNAMICS; WAVES;

D O I：

10.1080/01457632.2013.810087

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

With the influence of the different gas Reynolds numbers and liquid Reynolds numbers on heated falling film heat transfer, an experiment was performed by noncontact thermal infrared imaging technology under the gas-liquid cross-flow condition. The results indicated that during the increase of liquid Reynolds number the thickness and thermal resistance of liquid film increased in the determined temperature of the heating water, which weakened the heat transfer of the liquid film. However, the increase of liquid Reynolds number strengthened liquid film turbulence and therefore enhanced heat transfer. Under the synergistic effect of these two factors, there should be an optimal liquid Reynolds number that minimizes thermal resistance and maximizes the heat transfer coefficient of the liquid film. Temperature plays an important role in heat transfer of laminar liquid film flow. However, the heat transfer of turbulent liquid film flow is not sensitive to liquid film inlet temperature.

引用

页码：34 / 42

页数：9

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