基于FLUENT的板翅式换热器平直翅片数值模拟  

Numerical simulation of plain fins in plate-fin heat exchanger based on FLUENT

作　　者：李新禹[1] 陈林[1] 郝旭涛 孟林[1] LI Xin-yu;CHEN Lin;HAO Xu-tao;MENG Lin(School of Mechanical Engineering,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学机械工程学院,天津300387

出　　处：《化学工程》2018年第4期62-67,共6页Chemical Engineering(China)

基　　金：天津市自然科学基金资助项目(C16JCZDJC31400)

摘　　要：为了对比板翅式换热器不同平直翅片的换热性能,采用CFD软件FLUENT数值模拟计算方法,研究了空气在三角形和矩形不同结构参数翅片中的表面传热与流动阻力特性。揭示了2种形状不同结构参数翅片中流体的速度对翅片表面换热因子和翅片表面摩擦因子的影响规律;并用CFD-Post分析了各参数在翅片中的分布情况。结果表明:在所有翅片中,翅片表面换热因子和翅片表面摩擦因子都随着流体速度的增大而减小;在三角形翅片中,翅片表面摩擦因子由翅顶部位对称向翅底两端均匀递减,在翅底两端最边缘附近分布最小;在矩形翅片中,翅片表面摩擦因子在翅片中部分布比较均匀,在翅片两端最边缘附近突然变小。In order to compare the heat transfer performance of different plain fins in plate-fin heat exchanger,the surface heat transfer and flow resistance characteristics of air in triangular and rectangular fin with different structural parameters were investigated by CFD software FLUENT numerical simulation method.The investigation appeared the effect of the velocity of fluid in the two different shapes of structural parameters of fins with the fin surface colburn factor and the fin surface friction factor.And the distribution of the parameters in the fins was analyzed by CFD-Post.It is found that,in all fins,the fin surface colburn factor and the fin surface friction factor decrease with the increase of velocity.In the triangular fin,the fin surface friction factor is symmetrically evenly decreasing from the top of the fin to the two bottoms of the fin;in the two bottoms of the fin near the edge the distribution is the smallest.In the rectangular fin,the fin surface friction factor is evenly distributed in the middle of the fin,at the ends of the fin suddenly become smaller near the edge.

关 键 词：板翅式换热器 平直翅片 换热性能 FLUENT 数值模拟 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]