H型鳍片管性能优化的数值研究  

Numerical Study on Performance Optimization of H-type Finned Tubes

作　　者：张知翔[1] 王云刚[1] 赵钦新[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《动力工程学报》2010年第12期941-946,共6页Journal of Chinese Society of Power Engineering

基　　金：863计划"大型干法水泥线纯低温余热发电双压技术"资助项目(2007AA05Z251)

摘　　要：基于Fluent平台,利用Realizablek-ε湍流模型对H型鳍片管的传热特性、阻力特性和综合性能进行了数值研究.结果表明:当烟气流速越高、翅片高度越小、翅片节距越小、管束横向节距越大、管束纵向节距越大时,H型鳍片管的传热系数越大;当烟气流速越高、翅片高度越大、翅片节距越小、管束横向节距越小、管束纵向节距越大时,H型鳍片管的流动阻力越大;当相对翅片高度为h/d=2.105、翅片节距越小、管束横向相对节距为s1/d=2.237、管束纵向节距越小时,H型鳍片管的综合性能最好.Numerical study on heat transfer and flow resistance characteristics as well as comprehensive performance of H-type finned tubes was performed by using Realizable k-ε turbulent model based on Fluent platform.Results show that the heat transfer coefficient of H-type finned tube increases with rising gas velocity,transversal pitch and longitudinal pitch of tube banks,and with reducing fin height and fin pitch.The flow resistance of H-type finned tube increases with the rise of gas velocity,fin height and longitudinal pitch,and with the decrease of fin pitch and transversal pitch.Best comprehensive performance of H-type finned tube will be obtained when the relative fin height h/d and transversal pitch s_1/d are 2.105 and 2.237 respectively,while the fin pitch and longitudinal pitch are the smallest.

关 键 词：H型鳍片管 传热特性 阻力特性 综合性能 数值研究 

分 类 号：TK124[动力工程及工程热物理—工程热物理]