摘要
对圆管内添加两种宽度的十字形扭带的强化传热进行了数值模拟,对传热与阻力特性和PEC值进行了比较分析,模拟结果表明:通过减小十字形扭带的宽度使换热管内流体核心区域扰动,在紊流区域能在换热强化减小不大的情况下有效减小流体阻力,从而能提高换热管的性能。
Numerical simulation of heat transfer enhancement by adding cross twisted-tapes of two different widths in the circular tubes was performed. The character of heat transfer and flow resistant as well as the PEC value were analyzed with comparison. The results showed that the flow resistant was reduced considerably with slight reduction of the heat transfer in the turbulent flow when the cross twisted-tape width was reduced, accordingly, the thermal performance factor was augmented.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第7期1216-1218,共3页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展计划资助项目(No.2007CB206903)
国家自然科学基金资助项目(No.50721005)
关键词
十字形扭带
核心流
强化传热
流动阻力
PEC
cross twisted-tape
core flow
heat transfer enhancement
flow resistant
PEC
