树状分支传热结构层次生长优化设计技术

摘要/Abstract

摘要：

为了有效设计小空间高热流密度电子元器件的传热结构，需要合理分布其散热通道。针对现有传热结构拓扑优化设计结果形态过于复杂、加工制造困难等局限，基于自然界叶脉分支系统的分层生长特征，提出一种层次生长树状分支散热通道的优化设计方法。主通道和次通道分别采用不同的生长控制策略，依次生长形成传热结构，由基于温度信息的空间殖民算法控制主通道的生长，由最小热阻原理控制次通道的生长。对典型的二维和三维散热通道设计问题展开研究，并与SIMP方法设计结果进行对比。研究结果表明，所得到的散热通道形态简单、清晰，无细小分支和灰度单元，具有较好的散热性能和可制造性。

关键词: 散热通道分布, 叶脉脉序, 层次生长, 最小热阻, 空间殖民算法

Abstract: To design heat transfer structures for high heat flux electronic components with small space, reasonable heat transfer channel layout was the most effective approach. Aiming at the complex geometry boundaries and difficult-to-manufacture for heat transfer structures designed by topology optimization, a hierarchy growth method for optimal design of branching heat transfer structure inspired by hierarchical characteristics of natural vein branching system was suggested. Different growth control criteria were adopted for principal channels and lateral channels, which grew in succession to form heat transfer structures. Specifically, space colonization algorithm with temperature information was applied to the growth of principal channels, and the law of minimal thermal resistance was applied to control the growth of lateral channels. Several typical 2D or 3D design problems were studied by the suggested method, and the design results were compared with those of SIMP method. The results show that the heat transfer structure by hierarchy growth method has simple and clear geometry boundary, no tiny channel and gray element, therefore it is easy to be manufactured, and has good thermal performance.

Key words: heat transfer channel layout, leaf venation, hierarchy growth, minimal thermal resistance, space colonization algorithm

中图分类号:

TK124

熊敏;丁晓红;季懿栋;孟凡振. 树状分支传热结构层次生长优化设计技术[J]. 中国机械工程.

XIONG Min;DING Xiaohong;JI Yidong;MENG Fanzhen. Hierarchy Growth Method for Optimal Design of Branching Heat Transfer Structures[J]. China Mechanical Engineering.

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