纵向涡强化竖直平板自然对流换热的数值模拟  

Numerical Simulation of Natural Heat Convection on Vertical Plate Reinforced with Longitudinal Vortex

作　　者：杨泽亮[1] 吴欣颖[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2006年第12期115-119,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划项目(G20000263)

摘　　要：利用纵向涡发生器强化换热是一种有效的无源强化方式.文中运用PHEONICS计算软件对纵向涡发生器强化竖直平板自然对流换热进行了数值模拟,模拟结果与实验结果吻合较好.在此基础上,对纵向涡发生器的几何因素及在竖直平板上的布置方式进行了模拟研究.结果表明:采取多排布置时,纵向间距d1会影响换热,当d1为35mm时平均换热系数达到一个最大值;在其它几何条件相同的情况下,错列布置方式的整体换热效果优于顺列布置的情况;对于底边为20mm的纵向涡发生器采取错列布置时,换热效果是翼高和横向间距d2两种因素的叠加,最佳翼高和横向间距分别是20和90mm.Arranging longitudinal vortex In this paper, the PHEONICS calculating generators is an effective non-source method to enhance heat convection. software is used to numerically simulate the natural heat convection on the vertical plate reinforced with longitudinal vortex generators. The simulated results accord well with the experimental results. Then, a simulation investigation into the geometrical factors and the generator arrangement is conducted. It is indicated that （1） the longitudinal space will affect the heat convection when the longitudinal vortex generators are of a multi-row arrangement; （2） when is 35 mm, the average heat exchange coefficient reaches the maximum value; （3） in the same geometrical condition, the stagger arrangement of longitudinal vortex generators results in a better total heat exchange effect than the in-line arrangement; and （4） as to the stagger arrangement of longitudinal vortex generators with a winglet width of 20 ram, both the winglet height and the transverse space influence the heat exchange effect, and the optimal winglet height and transverse space are respectively 20 mm and 90 mm.

关 键 词：纵向涡 自然对流 强化换热 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]