Constructal design of cooling channel in heat transfer system by utilizing optimality of branch systems in nature
Constructal design of cooling channel in heat transfer system by utilizing optimality of branch systems in nature
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DOI：
10.1115/1.2426357
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发表时间：
2007-03-01
影响因子：
--
通讯作者：
Yamazaki, Koetsu
中科院分区：
文献类型：
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作者：
Ding, Xiaohong;Yamazaki, Koetsu
自然界分支系统的形态与工程中传热系统冷却通道的布置有相似之处。自然界中的分支系统总是以一种近似全局最优性能的方式生长。本文利用自然界分支系统的最优性，提出了一种创新的换热系统冷却通道布局设计方法，根据自然界分支系统的共同生长机制再现了它们的涌现过程。树枝在所谓的营养密度的控制下生长，从而使树枝的分布可能依赖于营养的分布。分支的生长也满足水动力条件和最小能量损失原则。如果将分支系统生成过程中的所谓营养密度称为传热系统中的热能，则分支的分布负责冷却通道的分布。所构建的冷却通道具有类似分支系统的最优性，可以灵活有效地设计成任何灌注体积形状，对非常复杂的热边界条件进行自适应冷却。研究了导电冷却通道和对流冷却通道的设计问题，并对二维和三维冷却通道的布局进行了说明。采用有限元方法对所设计的换热系统的冷却性能进行了分析，并与其他常规设计方法的结果进行了比较。
There are similarities between the morphology of branch systems in nature and the layout of cooling channel in heat transfer system in engineering. The branch systems in nature always grow in such a way that approximate global optimal performances can be achieved. By utilizing the optimality of branch systems in nature, an innovative layout design methodology of cooling channel in heat transfer system is suggested in this paper The emergent process of branch systems in nature is reproduced according to their common growth mechanisms. Branches are grown under the control of a so-called nutrient density so as to make it possible for the distribution of branches to be dependent on the nutrient distribution. The growth of branches also satisfies the hydrodynamic conditions and the minimum energy loss principle. If the so-called nutrient density in the generation process of branch systems is referred to as the heat energy in a heat transfer system, the distribution of branches is responsible for the distribution of cooling channels. Having similar optimality of branch systems in nature, the constructed cooling channel car be designed flexibly and effectively in any shape of perfusion volume to be cooled adaptively to very complex thermal boundary conditions. The design problems of both a conductive cooling channel and a convective cooling channel are studied, and the layouts of two-dimensional and three-dimensional cooling channels are illustrated. The cooling performances of the designed heat transfer systems are discussed by the finite element method analysis and are compared with the results designed by other conventional design methods.