超高热通量下仿生蜂窝状表面的沸腾传热特性  

Boiling Heat Transfer Characteristics of Bionic Honeycomb Surfaces under Ultra-High Heat Flux

作　　者：徐谋 罗佳利 莫冬传 吕树申 XU Mou;LUO Jiali;MO Dongchuan;LU Shushen(School of Material,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]中山大学材料学院,深圳518107 [2]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》2025年第2期557-563,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金面上项目(No.51876226,No.52276095)。

摘　　要：本文采用电沉积法制备了不同厚度的多尺度仿生蜂窝状多孔表面,并对材料的微观形貌、流动特性以及池沸腾性能进行了表征和测试。结果表明,该结构在吸液过程中液体优先经过孔壁,再从底部至顶部润湿蜂窝孔,Sample#T1000厚度较大且孔壁面积比高,具有更优异的毛细能力。此外,Sample#T500厚度较薄,在低热流密度范围过热度较低,而Sample#T1000则具有较高的临界热流密度(CHF)。由于具有大量的成核位点,结合结构优异的流动特性以及天然的气液通道分离特性,在过热度为53 K的情况下Sample#T1000的CHF可达到700 W·cm^(-2)。In this study,multi-scale bionic honeycomb porous surfaces of varying thicknesses were prepared using electrodeposition.The microstructure,flow characteristics,and pool boiling performance of these materials were characterized and tested.The results indicate that during liquid absorption,the liquid preferentially wets the honeycomb pores through the pore walls,from the bottom to the top.Sample#T1000,with greater thickness and higher pore wall area ratio,exhibits superior capillary action.Additionally,Sample#T500,with a thinner thickness,shows lower superheat in the low heat flux density range,while Sample#T1000 demonstrates a higher critical heat flux(CHF).Due to the abundance of nucleation sites,excellent flow characteristics,and inherent liquid-vapor separation properties,Sample#T1000 achieves a CHF of up to 700 W·cm^(-2)at a superheat of 53 K.

关 键 词：超高热流密度 多尺度多孔结构 毛细特性 沸腾传热 

分 类 号：TK121[动力工程及工程热物理—工程热物理]