化学工程2024，Vol.52Issue(4)：11-16,6.DOI:10.3969/j.issn.1005-9954.2024.04.003
叠层交错凹穴微通道热沉内流动与传热特性
Flow and heat transfer properties in microchannel heat sink with laminated interlaced cavities
摘要
Abstract
A MCHS-LIC(microchannel heat sink with laminated interlaced cavities)was proposed to improve the heat dissipation performance of microchemical engineering devices with increasing miniaturization and high power.The flow and heat transfer properties in the MCHS-LIC were studied by numerical simulation.The influences of expansion-to-contraction ratio φ and height ratio β on thermal performance were investigated.The MCHS-LIC was compared with the MCHS(microchannel heat sink)with straight channel and MCHS with single-layer triangular cavities,respectively.The evaluation was performed for the comprehensive performance CPE of the MCHS-LIC.The results show that the Nussel number Nu and friction factorf of the MCHS-LIC are 10.1％-34.4％and 5.9％-28.7％higher than those of the MCHS with single-layer triangular cavities.For the MCHS-LIC,Nu,f and CPE decrease with the increase of φ.When φ is fixed and β=0.5,Nu,f and CPE reach the maximum value at the corresponding Reynolds number Re.The change of β within the range of 0.25-0.75 doesn't cause significant fluctuations in flow resistance under the same Re.The MCHS-LIC can strength fluid mixing and interrupt the redevelopment of thermal boundary layer,thereby enhancing heat transfer.关键词
叠层交错凹穴/微通道/热沉/数值模拟/综合性能/强化传热Key words
laminated interlaced cavities/microchannel/heat sink/numerical simulation/comprehensive performance/enhancing heat transfer分类
能源科技引用本文复制引用
柳林,张玲,张鑫宇,曹杨,曹子勇..叠层交错凹穴微通道热沉内流动与传热特性[J].化学工程,2024,52(4):11-16,6.基金项目
国家自然科学基金资助项目(51606014) （51606014）
江苏省自然科学基金资助项目(BK20160281) （BK20160281）
常州市科技计划资助项目(CJ20220124) （CJ20220124）
常州大学学生课外创新创业基金资助项目(202310292149A) （202310292149A）
常州大学机械与轨道交通学院SIETP基金项目(2022-C-03) （2022-C-03）
