基于拓扑优化的新型热沉翅片结构设计  

Topology optimization of heat sink structure based on variable density method

作　　者：季晓彤 解立垚 王坤 闵春华[1] JI Xiaotong;XIE Liyao;WANG Kun;MIN Chunhua(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401

出　　处：《河北工业大学学报》2022年第1期61-67,87,共8页Journal of Hebei University of Technology

基　　金：河北省青年科学基金(E2019202255)。

摘　　要：采用基于变密度法的拓扑优化方法对强制对流空气热沉结构进行优化设计,以最小压降作为优化目标,传热性能为约束条件,采用二维双层模型代替传统三维模型进行优化设计。采用在优化过程中改变插值参数方法,有效避免优化结果中阻塞结构的形成。将拓扑结构与直翅片结构进行对比,在入口速度为1.2 m/s时,拓扑结构热沉的平均温度比直翅片热沉降低了约5.4%,努塞尔数增加了约为94.1%,拓扑结构热沉有效地增强了换热效果。研究结果发现拓扑结构热沉翅片在入口和出口处分别存在局部高速区域,能够迅速带走热量,有利于翅片散热。The topology optimization method based on the variable density method is used to optimize the structure of the forced convection air heat sink.The minimum pressure drop is used as the optimization goal,the heat transfer perfor⁃mance is the constraint condition,and the two-dimensional double-layer model is used to replace the traditional three-di⁃mensional model for optimization design.This paper adopts the method of changing the interpolation parameters in the optimization process to avoid the blocking structure formation in the optimization results.The comparison of the topologi⁃cal structure with the straight fin structure shows as follow:when the inlet velocity is 1.2 m/s,the average temperature of the topological heat sink is about 5.4%lower than that of the straight fin heat sink,and the Nusselt number increases by about 94.1%,The topological structure heat sink effectively enhances the heat transfer effect.It is found that the topolog⁃ical structure heat sink fins have local high-speed areas at the entrance and exit respectively,which can quickly take away the heat and facilitate the heat dissipation of the fins.

关 键 词：拓扑优化 二维双层模型 插值公式 传热性能 变密度法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]