工质外循环强化开孔泡沫铜沸腾传热研究  

Heat transfer enhancement of boiling on open-cell copper foam by external circulation of working fluid

作　　者：邓松 雷诗林 胡材 谭帅[1] 伍勇[1] DENG Song;LEI Shilin;HU Cai;TAN Shuai;WU Yong(School of Chemical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《应用化工》2024年第11期2524-2527,2532,共5页Applied Chemical Industry

基　　金：四川省自然科学基金面上项目(2022NSFSC0257)。

摘　　要：为强化甲醇在开孔泡沫铜表面的沸腾传热,搭建了工质外循环沸腾实验装置,观察了不同孔密度泡沫铜表面的气泡行为,分析了不同孔密度泡沫铜的沸腾传热特性,研究了工质外循环对泡沫铜沸腾传热性能的提升效果。研究结果表明,工质外循环使传热系数(HTC)和临界热流(CHF)分别提升了51%和41%,孔密度95 PPI的泡沫铜强化沸腾传热效果最佳,最大HTC为4.9 W/(cm^(2)·K),CHF达到107.8 W/cm^(2)。提出了工质外循环对泡沫铜表面的主动补液和气泡脱离的沸腾传热强化机理。To enhance heat transfer of boiling of methanol on open-cell copper foam,an experimental setup of boiling with external circulation of working fluid was established.The bubble behavior on copper foam with different pore densities was observed and dependence of heat transfer on pore density of the copper foams was investigated.The heat transfer performance of the boiling of methanol on open-cell copper foam with external circulation was investigated.The results showed that the external circulation promoted heat transfer coefficient(HTC)and critical heat flux(CHF)of the boiling by 51%and 41%,respectively.The optimal pore density of copper foam for heat transfer of boiling on copper foam with external circulation was 95 PPI,resulting in the maximum HTC of 4.9 W/(cm^(2)·K)and CHF of 107.8 W/cm^(2).The heat transfer enhancement mechanism for boiling of external circulation improving forced liquid replenishment and bubble departure on copper foam was proposed.

关 键 词：外循环 沸腾 传热 泡沫铜 气泡行为 

分 类 号：TQ021.3[化学工程] TK124[动力工程及工程热物理—工程热物理]