摘要
本文通过磁控溅射纳米级氧化锌,制备出一种可直接用作热管吸液芯的泡沫金属,对所制备的泡沫金属吸液芯形貌、接触角、孔隙率、渗透率、毛细性能等传质性能进行了测试。并搭建池沸腾试验平台,测试泡沫金属吸液芯的传热性能。测试结果表明,在传质性能方面,磁控溅射后泡沫金属从疏水性表面转换成亲水性表面,磁控溅射对泡沫金属的孔隙率没有显著影响,渗透率下降明显但满足用作吸液芯的要求,且溅射48 h后泡沫金属的毛细性能提高了1.59倍。在传热性能方面,磁控溅射后泡沫金属换热性能虽然仍低于光滑表面,但与没有溅射的泡沫金属相比,最大壁面过热度下降了4.94 K,临界热流密度提高12.55%,最大换热系数提升29.65%。
In this paper, magnetron sputtering technology has been used to prepare foam metal which can be used as wick of heat pipe directly. Mass transfer performance of the wick has been tested, including microscopic appearance,contact angle, porosity, permeability and capillary. A pool boiling test system was set up to test the heat transfer performance of the wick. The test results show that in terms of mass transfer performance, the foam metal after magnetron sputtering has converted from a hydrophobic surface into a hydrophilic surface, which has no significant effect on the porosity, and the permeability decreases significantly but also meets the requirements of the wick, and the capillary of the foam metal after 48 hours magnetron sputtering increased by 1.59 times. In terms of heat transfer performance, the foam metal after magnetron sputtering is lower than that of the smooth surface, but compared with the original foam mental, after 48 h magnetron sputtering, the maximum wall surface decreased 4.94 K, the critical heat flux increased by 12.55%, and the maximum heat transfer coefficient increased by 29.65%.
作者
彭瑶
李立秋
李广
王银峰
朱跃钊
PENG Yao;LI Li-qiu;LI Guang;WANG Yin-feng;ZHU Yue-zhao(School of Mechanical and Power Engineering,Nanjing Tech University)
出处
《建筑热能通风空调》
2020年第4期31-35,6,共6页
Building Energy & Environment
基金
国家自然科学基金(No.51806100)
江苏省自然科学基金(No.BK20180706)。
关键词
泡沫金属
吸液芯
磁控溅射
传热传质性能
metal foam
wick
magnetron sputtering
heat and mass transfer performance
作者简介
彭瑶(1994-),女,硕士研究生,江苏省南京市浦口区南京工业大学江浦校区(211816),025-58139352,E-mail:yao_p@qq.com。
