Journal of South China University of Technology (Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (1): 118-122,128.doi: 10.3969/j.issn.1000-565X.2017.01.017

• Mechanical Engineering • Previous Articles     Next Articles

Experimental Investigation into Leaf-Vein-Like Fractal Structure Applied to Evaporation of Vapor Chamber

LIU Wang-yu WANG Li LUO Yuan-qiang   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-03-22 Revised:2016-08-12 Online:2017-01-25 Published:2016-12-01
  • Contact: 刘旺玉( 1966-) ，女，博士，教授，主要从事现代加工方法与结构优化设计研究 E-mail:mewyliu@scut.edu.cn
  • About author:刘旺玉( 1966-) ，女，博士，教授，主要从事现代加工方法与结构优化设计研究
  • Supported by:
    Supported by the National Natural Science Foundation of China( 51375169)

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Abstract:

Due to the fact that the transpiration of plant leaves takes away a large amount of heat,a new leaf-veinlike fractal structure is designed to optimize the thermal structure of vapor chambers,and the heat transfer effect of a leaf-vein-like fractal structure wick in the evaporation of vapor chambers is investigated.Then,by preparing a vapor chamber through chemical etching to perform a thermal experiment,the changes of the temperature difference between the bottom surface of the evaporation and the steam in the vapor chamber are discussed,and the thermal resistance of each part is calculated.Moreover,the thermal characteristics of the wick at the fractal angles of 30°,40°,50° and 60° are compared.The results indicate that the structures of the fractal angles of 40° and 50° have almost the same thermal performance,and the performance is better than those at the fractal angles of 30° and 60°,which means that smaller thermal resistance brings about better heat transfer and flow behaviors.

Key words: vapor chamber, leaf-vein-like fractal structure, heat transfer

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