放射状槽道与毛细芯复合表面池沸腾换热研究  

Pool Boiling Heat Transfer Enhancement on the Hybrid Surfaces Coupling Capillary Wick and Radial Minichannels

作　　者：马祥 刘万渤 张永海 魏进家[1,3] 李彬 MA Xiang;LIU Wanbo;ZHANG Yonghai;WEI Jinjia;Li Bin(School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China;State Key Laboratory of Superabrasives,Zhengzhou 450001,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学化学工程与技术学院,西安710049 [2]超硬材料磨具国家重点实验室,郑州450001 [3]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2023年第5期1400-1404,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51976163);中央高校基本科研业务费(No.xtr052022011);陕西省重点研发计划高校联合项目–重点项目(No.2021GXLH-Z-076);超硬材料磨具国家重点实验室开放课题(No.GXNGJSKL-2022-2);西安交通大学思源学者人才基金“挖潜支持计划”。

摘　　要：本文将“米”字形放射状槽道强化面积大、气泡脱离阻力小与毛细芯成核位点多等优点相结合,设计加工出一系列铜基放射状槽道与烧结毛细芯耦合散热表面,在10 K、20 K和30 K三个不同过冷度下进行了HFE-7100池沸腾换热实验,得到不同表面在不同过冷度条件下的沸腾换热性能。结果表明,槽深对换热影响较大,耦合毛细芯的铜基散热结构可以进一步提高临界热流密度和换热系数。最大临界热流密度和换热系数分别可达130.1 W/cm^(2)和0.94 W/(cm^(2)·K),并对实验过程中的气泡动力学行为进行了分析。In this study,several hybrid surfaces coupling capillary wick and radial minichannels were designed and processed by combining the advantages of the large heat transfer area of radial minichannel,low bubble release resistance and a large number of nucleation sites of capillary wick.The pool boiling heat transfer performance of these hybrid surfaces was obtained using HFE-7100 as the working fluid at different subcooled temperature(ΔT_(sub)=10 K,20 K and 30 K).The results show that the depth of minichannels has a significant effect on the heat transfer characteristics,and these hybrid surfaces coupling capillary wick and radial minichannels can further enhance the critical heat flux(CHF)and heat transfer coefficient(HTC),which are up to 130.1 W/cm^(2) and 0.94 W/(cm^(2)·K),respectively.The bubble dynamics during the experiments are also analysed.

关 键 词：放射状槽道 毛细芯 池沸腾 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]