摘要
本文采用数值计算方法分析了圆管中填充多孔介质和肋片时在充分发展段的流动与传热特性。结果表明,在管内部分填充多孔介质的情况下增加适量的不连续肋片能达到如下两个目的:(1)不连续的肋片能在壁面上扰动流体来强化换热而阻力增加不大;(2)不连续的肋片能在壁面上支撑多孔介质使其在径向固定。计算结果表明,这种复合强化方法的Nu和PEC值比只在管内填充多孔介质时平均高出54%和36%。
The present study investigates numerically the flow and heat transfer characteristics for fully developed flow in a tube filled with porous media and ribs. The results indicate that the two purposes could be achieved by adding some non-continuous ribs in the inner wall surface of tube partially filled with porous media： （1） disturbing the fluid flow near the boundary to enhance heat transfer, and not increasing too much flow resistance; （2） supporting （non-continuous） the porous medium insert so that it can be fixed in the radial direction of tube. The numerical results show that the average of Nu value and PEC value are 54% and 36% higher by using the compound technique than that by using porous media, respectively.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第6期1032-1034,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)
