摘要
本文对水和空气流过4个微细板翅结构和1个烧结多孔结构中的对流换热进行了实验研究，并对其流动与对流换热性能进行了分析和比较。结果表明：在本文实验参数范围内，与空槽道相比，这4种微细板翅结构分别使水的对流换热系数增加10～24倍，分别使空气的对流换热增强了16～40倍；与相同孔隙率的烧结多孔结构相比，微细板翅结构中的流动阻力相近，而对流换热系数却增大。存在最优的微细板翅结构，其换热性能大大强于烧结多孔结构，而流动阻力更小。
Forced convection heat transfer of air and water in four kinds of mini-fin structures and a sintered bronze porous media were investigated experimentally. The results showed that for the tested conditions the convection heat transfer coefficient was increased 10~24 fold for water and 16~40 fold for air in the mini-fin structures compared with an empty plate channel. The heat transfer coefficients in the mini-fin structure were larger than in the sintered porous plate channel with the same porosity and material and similar dimensions. An optimum mini-fin structure should exist, which has much larger heat transfer coefficient and less pressure drop than sintered porous media.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第2期275-277,共3页
Journal of Engineering Thermophysics
基金
国家杰出青年科学基金资助(No.50025617)
国家重点基础研究发展计划资助项目(No.G1999033106)
