Constructal entransy dissipation rate minimization for umbrella-shaped assembly of cylindrical fins

作     者：XIAO QingHua CHEN LinGen SUN FengRui 

作者机构：Postgraduate School Naval University of Engineering Wuhan 430033 China 

基　　金：supported by the National Natural Science Foundation of China (Grant No.10905093) the Program for New Century Excellent Talents in University of China (Grant No.NCET-04-1006) the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No.200136) 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2011年第54卷第1期

页      码：211-219页

摘      要：Umbrella-shaped assembly of cylindrical fins is optimized by adopting analytical method and taking dimensionless mean thermal resistance (MTR) as performance index. The optimal construct of umbrella-shaped assembly is obtained. The results show that the heat conductance performance of the assembly becomes ever worse with ever greater number of elemental cylindrical fins,the umbrella-shaped assembly reduces to cylindrical fin in some values of design parameters,and the diameters’ dependence on design parameters is weak for the optimized assembly. An equivalent thermal resistance defined based on entransy dissipation rate (EDR) reflects an average heat transfer effect of the assembly. The constructal design corresponding to the minimum EDR (or MTR) should be adopted for designing an assembly of fins in engineering at the limit safe condition.

主 题 词：constructal theory fin entransy dissipation rate intensifying heat transfer generalized thermodynamic optimization 

学科分类：08[工学] 082402[082402] 0824[工学-林业工程类] 

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