制冷学报2025，Vol.46Issue(5)：166-174,9.DOI:10.12465/j.issn.0253-4339.2025.05.166
多孔微射流热沉沸腾传热特性研究
Study of the Heat Transfer Characteristics of Porous Microjets Boiling in Heat Sinks
摘要
Abstract
With the development of computer technology and the application of artificial intelligence,electronic chips are becoming increasingly miniaturized and integrated,leading to a rapid increase in their volumetric heating power,thus affecting their normal operation.To address this problem,a heat sink with an array of finned porous microjets was designed,and HFE-7100,which has good thermal stability and electrical insulation,was selected as the cooling medium.Through a combination of numerical simulations and experimental research,the influence of factors such as the longitudinal aspect ratio of the slotted fins,inlet subcooling,inlet volumetric flow rate,and jet Reynolds number on the heat transfer process of microjet boiling was investigated.The results showed that the optimized structure with an aspect ratio of 0.5 met the requirements of chip cooling and had a better cooling effect.In the single-phase convection heat transfer stage,under the same working condition,the inlet subcooling degree had little effect on heat transfer,and increasing the volume flow rate or jet Reynolds number could strengthen the convection heat transfer,and the maximum heat transfer coefficient could reach 15 724.40 W/(m2·K).However,in the jet boiling stage,the heat flux corresponding to the onset of nucleate boiling(ONB),and it decreased with a decrease in the inlet subcooling degree.Increasing the inlet volume flow rate or jet Reynolds number inhibited the occurrence of boiling,thus weakening the heat transfer.However,compared with the single-phase convective heat transfer stage,the heat transfer coefficient increased by 20.6％.关键词
沸腾传热/微射流/电子芯片/两相流/强化传热Key words
boiling heat transfer/microjets/electronic chips/two-phase flow/heat transfer enhancement分类
通用工业技术引用本文复制引用
孙健,叶凡,钟超,李杰..多孔微射流热沉沸腾传热特性研究[J].制冷学报,2025,46(5):166-174,9.基金项目
本文受江西自然科学基金(20202BAB204022)和景德镇市科技计划项目(20234SF007)资助.(The project was suppor-ted by Jiangxi Natural Science Foundation(No.20202BAB204022)and Jingdezhen Science and Technology Program(No.20234SF007).) （20202BAB204022）
