Numerical Simulation of Heat Transfer Performance for Ultra-Thin Flat Heat Pipe

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  • 1. School of Electric Power, South China University of Technology, Guangzhou 510640, China
    2. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China

网络出版日期: 2023-11-28

基金资助

This work is supported by the National Natural Science Foundation of China (Granted No. 52176156).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

Numerical Simulation of Heat Transfer Performance for Ultra-Thin Flat Heat Pipe

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  • 1. School of Electric Power, South China University of Technology, Guangzhou 510640, China
    2. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China

Online published: 2023-11-28

Supported by

This work is supported by the National Natural Science Foundation of China (Granted No. 52176156).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

摘要

采用数值模拟方法研究了180目铜网吸液芯超薄平板热管在不同加热功率下的传热性能。超薄平板热管外形尺寸为:长80mm,宽8.5 mm,高1mm。采用FLUENT中多孔介质模型和用户自定义函数(UDF)耦合的方式对超薄平板热管的温度分布和流动特性进行仿真模拟。为了验证数值模型的准确性,将超薄平板热管蒸发段温度的模拟结果与实验数据进行了对比。结果表明,该数值模型对于超薄平板热管的一维传热方法具有较好的精度。吸液芯的速度、压降和整体温差具有相同的变化趋势,随着加热功率的增加,超薄平板热管的整体温差增大,吸液芯内的流动压降和冷凝液回流速度也增大。

本文引用格式

YAN Wentao, YANG Xin, LIU Tengqing, WANG Shuangfeng . Numerical Simulation of Heat Transfer Performance for Ultra-Thin Flat Heat Pipe[J]. 热科学学报, 2023 , 32(2) : 643 -649 . DOI: 10.1007/s11630-023-1768-0

Abstract

The heat transfer performance of ultra-thin flat heat pipes with #180 copper mesh wick was studied by numerical simulation for different heating powers. The length, width and height of the ultra-thin flat heat pipe are 80 mm, 8.5 mm and 1 mm, respectively. The temperature distribution and flow characteristics of ultra-thin flat heat pipes were simulated by coupling porous media model and user-defined function (UDF) in FLUENT. To validate the accuracy of the numerical model, the simulation results of the ultra-thin flat heat pipe are compared with the experimental data in predicting the evaporation section temperature. The numerical model has good accuracy for the one-dimensional heat transfer method of ultra-thin flat heat pipes. The velocity, pressure drop of the wick and total temperature difference have the same variation trend. With the increase of heating power, the temperature difference of ultra-thin flat heat pipes increases, and the pressure drop and the liquid velocity in the wick also increase.

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