三维点阵结构拓扑开发研究进展及其对流传热性能对比  

Topology Review and Convective Heat Transfer Comparison of 3D Lattice Structures

作　　者：丁一 吴威涛 封锋[1] 李书磊 闫宏斌 DING Yi;WU Weitao;FENG Feng;LI Shulei;YAN Hongbin(Key Laboratory of Special Engine Technology,Ministry of Education,School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,P.R.China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,P.R.China)

机构地区：[1]南京理工大学机械工程学院特种动力技术教育部重点实验室,南京210094 [2]西北工业大学航海学院,西安710072

出　　处：《应用数学和力学》2024年第8期1001-1023,共23页Applied Mathematics and Mechanics

基　　金：中央高校基本科研业务费(309231B8801)。

摘　　要：系统综述了国内外三维点阵结构拓扑开发的研究现状,分别在等流量、等压降和等泵功条件下对比了其总体传热与散热性能.在模型验证的基础上,针对12种具有相同特征尺寸和孔隙率的点阵结构,分别在6种不同点阵材质、两种不同取向下开展了数值模拟与性能对比.结果表明:点阵拓扑、点阵材质及运行工况对其传热和散热性能优劣具有显著影响;不同条件下,性能最优的点阵不尽相同.在等流量下,A向节点偏移X点阵和A向八叉树点阵的传热性能最优,A向节点偏移X点阵的散热性能最优.在等压降下,A向节点偏移X点阵和B向节点偏移X点阵的传热性能最优,B向立方点阵和B向节点偏移X点阵的散热性能最优.在等泵功下,A向节点偏移X点阵和B向矩形杆金字塔点阵的传热性能最优,B向节点偏移X点阵和B向矩形杆金字塔点阵的散热性能最优.在固定孔隙率和特征尺寸下构建了现有点阵结构的传热与散热性能数据库,可作为新型点阵拓扑开发的比较基准,同时,可为不同工程设计中点阵结构的选型提供指导.The topologies of 3D lattice structures were reviewed and their overall heat transfer and heat dissipa⁃tion performances compared,under the fixed mass flow rate,pressure drop and pumping power conditions,re⁃spectively.In total 12 lattice structures,with 6 different materials and in 2 orientations,were compared.The conjugate heat transfer in the lattice structures was solved with validated numerical models.Numerical results indicate that,the lattice topology,the lattice material and the operating conditions significantly affect the heat transfer and cooling performances.The optimal lattice differs under different comparison conditions.Under the fixed mass flow rate condition,the shifted X⁃lattice in orientation A and the octet lattice in orientation A exhibit the best heat transfer performance;the shifted X⁃lattice in orientation A also has the best cooling performance.Under the fixed pressure drop condition,the shifted X⁃lattices in both orientations A and B exhibit the best heat transfer performance;while the cubic lattice in orientation B and the shifted X⁃lattice in orientation B show the best cooling performance.Under the fixed pumping power condition,the shifted X⁃lattice in orientation A and the rectangular pyramid lattice in orientation B exhibit the best heat transfer performance;the shifted X⁃lattice in orientation B and the rectangular pyramid lattice in orientation B show the best cooling performance.The heat transfer and cooling performance database under a given lattice porosity and A characteristic length was presen⁃ted as the benchmark for performance comparison of newly developed lattice structures.In addition,the data⁃base can benefit various engineering designs in selecting the appropriate lattice structures.

关 键 词：周期性多孔材料 对流传热 压降 性能对比 

分 类 号：O35[理学—流体力学] V19[理学—力学]