摘要
在换热表面上周期性地安装粗糙元,可以使流动区域产生漩涡从而增强换热。本文采用数值分析的方法,以水作为工作介质,以带有纵向涡发生器狭窄矩形通道为研究对象,研究不同排列方式纵向涡发生器的传热性能,分析不同的纵向涡发生器入射角度β、不同流向、不同纵向涡间距对换热和流动特性的影响。结果表明,纵向涡发生器能够强化换热,当入射角度β=50°时,换热效果最佳。
Heat transfer enhancement for convective channel flows is often obtained by some ribs periodically mounted on the heat transfer surface which induces vortices to augment transverse fluid mixing. In this paper, the performance of turbulent flow and heat transfer in a narrow rectangular channel with periodically roughened by rectangular bars as LVGs are studied by numerical simulation for water with Reynolds number ranging from 1.5×10^4 to 3.5×10^4, the effect of the height of LVGs, angle of incidence, space between LVGs were also analyzed. It was found that the LVGs are able to greatly improve the comprehensive heat transfer performance. The best effect of heat transfer could been obtained when the incidence angler equals to 50°.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2007年第3期27-31,共5页
Nuclear Power Engineering
基金
国家自然科学基金资助(50576089)
关键词
纵向涡发生器
数值模拟
强化传热
Longitudinal vortex generators, Numerical simulation, Heat transfer enhancement
