摘要
本文对空气流过镍、铜材料泡沫金属结构和2种板翅结构的对流换热进行了实验研究。结果表明:在本文实验参数范围内,与空槽道相比,两种板翅结构分别使空气的对流换热系数增加了3～5倍和7～9倍;相同的实验条件下镍、铜材料的泡沫金属结构分别使空气的对流换热系数增加了9～11倍和10～12倍;与相近孔隙率的板翅结构相比,泡沫金属结构的流动阻力更大些。本文还对泡沫金属与板翅结构内的对流换热进行了数值模拟,得到较好的模拟结果。
Forced convection heat transfer of air in nickel and copper metal foams and two mini- fin structures was investigated experimentally. The results show that for the tested conditions, the convection heat transfer coefficient is increased 3-5 fold and 7-9 fold for air in the two mini-fin structures compared with an empty plate channel, while the convection heat transfer coefficient for air in the nickel and copper metal foams is increased 9-11 fold and 10-12 fold compared with an empty plate channel. The flow resistance in the metal foams is larger than in the mini-fin structures. Numerical simulations of convection heat transfer in metal foams and mini-fin structures correspond well with the experimental data.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第1期121-123,共3页
Journal of Engineering Thermophysics
基金
清华大学基础研究基金(No．JCpy2005049)
关键词
泡沫金属
板翅结构
对流换热
实验研究
数值模拟
metal foam
mini-fin
convection heat transfer
experiment
numerical simulation
