树状分支传热结构层次生长优化设计技术

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.