纵向涡流发生器强化传热数值研究进展  

Simulations on Heat Transfer Enhancement by Longitudinal Vortex Generators:State-of-the-Art and Case Study

作　　者：高猛[1] 周国兵[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《现代电力》2010年第5期76-81,共6页Modern Electric Power

基　　金：高等学校博士学科点专项科研基金项目(20070079018);河北省自然科学基金(E2008001231);中国电机工程学会电力青年科技创新项目(2008);中央高校基本科研业务费专项基金(09MG25)

摘　　要：对近年来纵向涡流发生器在换热器气侧强化传热和流阻性能的数值研究进行综述,内容包括：纵向涡流发生器类型及布置方式;纵向涡流发生器强化传热和流阻性能;纵向涡强化传热机理。分别对带斜截半椭圆柱面和斜截半椭圆柱体矩形通道内的层流流动和传热进行数值模拟。结果表明,两涡流发生器强化传热效果几乎相同,比平直通道高72.7%-133.1%;压力损失分别比平直通道增加100.4%-168.3%和108.1%-183.5%,斜截半椭圆柱面强化传热和流阻综合性能优于斜截半椭圆柱体。Numerical investigations on heat transfer enhancement and flow resistance in the air-side of heat exchangers with longitudinal vortex generators（LVGs）have been reviewed.The following aspects were discussed：type and layout of LVGs;heat transfer enhancement and flow resistance performance of LVGs;mechanism of heat transfer enhancement of the longitudinal vortices.The laminar flow and heat transfer in rectangular channels with oblique-cut semi-elliptic cylinder shell and oblique-cut semi-elliptic cylinder were numerically simulated respectively.The results show heat transfer enhancements of these two types of vortex generators are almost identical and 72.7%～133.1% higher than smooth channel.Pressure losses increase about 100.4%～168.3% and 108.1%～183.5% higher than smooth channel respectively.The comprehensive performance of heat transfer enhancement and flow resistance of oblique-cut semi-elliptic cylinder shell is superior to that of oblique-cut semi-elliptic cylinder.

关 键 词：强化传热 流阻 数值模拟 纵向涡流发生器 

分 类 号：TK172[动力工程及工程热物理—热能工程]