蜂窝多孔结构表面强化沸腾传热的数值模拟研究  

Numerical Simulation on Enhanced Boiling Heat Transfer With Honeycomb Porous Structured Surfaces

作　　者：洪敏[1] 张轩[1] 莫冬传 吕树申 衡益 HONG Min;ZHANG Xuan;MO Dongchuan;LU Shushen;HENG Yi(School of Computer Science and Engineering,Sun Yat-sen University Guangzhou 510006,China;School of Materials,Sun Yat-sen University,Shenzhen 518107,China;Guangdong Engineering Technology Research Centre for Advanced Thermal Control Material and System Integration(ATCMSI),Guangzhou 510275,China)

机构地区：[1]中山大学计算机学院,广州510006 [2]中山大学材料学院,深圳518107 [3]广东省先进热控材料与系统集成工程技术研究中心,广州510275

出　　处：《工程热物理学报》2024年第5期1470-1475,共6页Journal of Engineering Thermophysics

基　　金：广东省重点领域研发计划重大专项(No.2021B0101190003);广东省自然科学基金面上项目(No.2022A1515011514)。

摘　　要：本文将CT扫描获取的蜂窝多孔表面的3D几何结构用于池沸腾两相流数值模拟,完整地模拟了气泡成核、生长及脱离的过程。气泡动力学以及加热面热流密度分布表明蜂窝多孔表面的孔洞约束了气泡生长及合并,使得气泡脱离直径较小,脱离频率加快。成核位点数目增多,单位时间脱离壁面的气泡数目增多。因此,蜂窝多孔表面具有的蜂窝孔可以加速气泡脱离以及具有丰富的成核位点是增强加热面整体散热性能的主要原因。Numerical simulation is employed to investigate the enhanced boiling heat transfer phenomenon with honeycomb micro-nano porous structured surfaces obtained through CT scanning,providing a comprehensive analysis of the processes of bubble nucleation,growth,and detachment.The investigation of bubble dynamics and heat fux distribution on the heated surface reveals that the pores in the honeycomb porous surface impose constraints on bubble growth and coalescence,resulting in small bubble detachment diameters and high detachment frequency.The increased number of nucleation sites leads to a higher quantity of bubbles detaching from the wall.Consequently,the presence of honeycomb pores on the porous surface accelerating bubble detachment and the abundant nucleation sites are the primary factors enhancing the overall heat dissipation performance of the heated surface.

关 键 词：蜂窝多孔表面 CT扫描 池沸腾 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]