摘要
本文用差分法对封闭圆内不同缝隙度的开缝圆环自然对流换热进行了数值模拟,结果表明,R_a=1.3×10~5时,在不同缝隙度下存在双环流和叁环流两种流型,并且随缝隙度的改变总散热量存在一个峰值。
In this paper a numerical prediction has been made for the natural convective heat transfer between a horizontal cylindrical envelope and an internal concentric hollow cylinder with different slot width. It is found that the fluid flow and heat transfer is mainly controlled by a double-vorticity structure whea the slot width is less than some italue, while beyond this value the flow is dominated by a triplevorticity structure. With increasing in slot width, the total heat transfer rate incceases first, reaches its maximum, and then decreases.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1991年第2期193-196,共4页
Journal of Engineering Thermophysics
基金
国家教委博士点基金
