化工学报2025，Vol.76Issue(3)：1006-1017,12.DOI:10.11949/0438-1157.20240862
局部多热源下拓扑优化通道平板脉动热管的传热特性
Heat transfer characteristics of topology optimized channel flat-plate pulsating heat pipe under local multiple heat sources
摘要
Abstract
The traditional serpentine structure and topological structure flat plate pulsating heat pipes were made on alloy copper by wet etching technology.With R141b as the working fluid,the start-up and heat transfer performance differences and change laws of the above two heat pipes under local heating(heating area 15 mm×15 mm,20 mm×20 mm and 25 mm×25 mm)were compared and studied.Experimental results show that both traditional and topological optimized OHPs exhibit improved start-up and heat transfer performance with increasing local heat source area.Compared to the traditional OHP,the topology-optimized design concentrates the channels around the local heat source,effectively expanding the evaporation/boiling area in the heating section and minimizing the influence of the heat source area on its start-up and thermal performance.For the traditional OHP with multiple local heat sources,the start-up behavior can be categorized into two types:'abrupt'and'gentle',which resemble the start-up characteristics observed with a single uniform heat source.In contrast,the topologically optimized OHP only displays a'gentle'start-up behavior,with no abrupt temperature changes observed under any conditions.The topological design significantly improves the overall temperature uniformity and the heat transfer limit of the OHP,particularly improving heat transfer performance for smaller heat source areas and medium-low heating powers.For instance,when the heat source area is 15 mm×15 mm and the heating power is approximately 75 W,the effective thermal conductivity of the topologically optimized OHP increases by about 41.8%compared to the traditional design.The optimized channel layout mitigates the limitations of traditional OHPs in dissipating heat from multiple localized sources,offering superior temperature uniformity and heat transfer capacity,thus expanding the application potential of OHPs.关键词
脉动热管/拓扑优化/传热/启动/多热源Key words
oscillating heat pipe/topological optimization/heat transfer/start-up characteristics/multiple heat sources分类
能源与动力引用本文复制引用
孙芹,周国庆,翟万领,高山,罗倩倩,屈健..局部多热源下拓扑优化通道平板脉动热管的传热特性[J].化工学报,2025,76(3):1006-1017,12.基金项目
国家自然科学基金项目(52306087,52276067) （52306087,52276067）
江苏省自然科学基金项目(BK20230533) （BK20230533）
