【作者】 朱纪磊； 汤慧萍； 奚正平； 支浩； 敖庆波；

【Author】 ZHU Ji-lei~(1,2),TANG Hui-ping~1,XI Zheng-ping~1,ZHI Hao~1,AO Qing-bo~1 (1.State Key Laboratory of Porous Metal Materials,Northwest Institute for Nonferrous Metal Research, Xi’an 710016,China; 2.State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China)

【机构】 西北有色金属研究院金属多孔材料国家重点实验室； 西安交通大学金属材料强度国家重点实验室；

【摘要】 随着航空航天、信息技术的发展和国家对节能降耗的日益重视,强化相变传热技术得到国内外的广泛关注。金属纤维多孔表面材料是一种性能优异的强化相变传热材料。根据金属纤维多孔材料的强化沸腾传热机理,采用烧结的方法,在金属圆管外壁制备不同孔隙结构的金属纤维多孔表面用于强化核态沸腾传热,纤维多孔层的厚度范围为0.6～2.5mm。制备的金属纤维多孔表面材料是由不锈钢纤维呈无序状堆叠而成,纤维间冶金结合良好,孔隙结构均匀,且孔隙贯通,这种结构由于有强化相变传热应用。材料的沸腾传热性能检测结果表明,制备的金属纤维多孔表面材料的传热性能明显优于光表面材料,且多孔表面的微结构参数对传热性能有显著影响。更多还原

【Abstract】 With the fast advancement of aeronautics,information,and biology technologies,phase change heat transfer has received a great attention.Metal fibrous porous material is a perfect working media where the phase change heat transfer occurs.Based on the mechanisms and practical technologies of enhanced phase change heat transfer,the nucleate boiling heat transfers were prepared by covering the metal tube with metal fibrous porous layers with different thickness and porosity,their thickness are from 0.6 to 2.5mm.The structural characteristic and enhancing effects of sintered porous layer for nucleate boiling heat transfer are analyzed in detail in this paper.The results indicate that pore structure properties have obvious effect on heat transfer performance.For nucleate boiling heat transfer,to obtain increase of heat transfer,optimum pore size,proper thickness and porosity were required.These studies can supply the designing and manufacturing data for application of these new heat transfers.更多还原