多排纵向涡发生器强化竖直平板自然对流换热的实验研究  

Experimental study on heat transfer enhancement in nature convection in vertical plat by using delta-winglet longitudinal vortex generators arranged in rows

作　　者：龙靖安[1] 杨泽亮[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《热科学与技术》2005年第1期47-51,共5页Journal of Thermal Science and Technology

基　　金：国家重点基础研究发展计划项目 (G2 0 0 0 0 2 63 )

摘　　要：对多排纵向涡发生器对竖直平板自然对流的强化效果进行了研究。结果表明 ,在一定 Rayleigh数范围内 ,直角三角翼纵向涡发生器的翼高、翼宽以及多排布置的阵列方式是影响强化换热的主要因素。在高宽比一定的情况下 ,存在最佳翼高。发现多排布置时 LVG阵列方式的不同会影响换热效果 ;且要使得整个板的强化换热效果达到最佳 ,应选择沿竖直发热板长度方向间隔的布置多排 LVG,并适当拉大间隔距离。This paper focuses on the study of heat transfer enhancement in the nature convection in the vertical plat by using delta-winglet longitudinal vortex generators arranged in rows. In the experimental range of Rayleigh number, the height and width of the winglet of longitudinal vortex generator (LVG), the array form of longitudinal vortex generators on the heat transfer performance were experimentally investigated, and the best height of the winglet of longitudinal vortex generator was obtained. The results showed the change of the array form of longitudinal vortex generators could affect the heat transfer effect. And by arranged some longitudinal vortex generator arrays with appropriate portrait interval, the whole heat transfer effect of the interval could reach a prime value.

关 键 词：涡发生器 纵向涡 强化换热 自然对流换热 Rayleigh数 强化效果 换热效果 平板 布置 发热板 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK172[动力工程及工程热物理—热能工程]