翅高递减波纹翅片管换热器通道内流动与换热特性数值模拟  

Numerical study on heat and mass transfer in channel of wavy fin-and-tube with declined wavy height

作　　者：武广剑 阴继翔[1] 马建宗 

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024

出　　处：《热力发电》2015年第11期37-42,共6页Thermal Power Generation

基　　金：山西省自然科学基金项目(2012001024-4)

摘　　要：为了获得能在保证换热效果的同时流体流动阻力尽可能小的翅片管换热器型式,利用三维数值模拟的方法研究了等翅高和翅高均匀递减的波纹翅片管通道内流体的流动与换热特性,分析了2种不同翅高波纹翅片表面局部努塞尔数(Nu)和流动阻力损失的分布,并在不同雷诺数(Re)时与翅高均匀递减的波纹翅片的换热特性及通道内流体流动的阻力特性进行了对比。结果表明:在相同压降和相同泵功条件下,翅高均匀递减波纹翅片管换热器的综合换热性能均优于翅高为2.0mm的波纹翅片;翅高递减波纹翅片在保证换热效果的同时,还具有节能、减阻的特性。To obtain a fin tube heat exchanger which can both ensure the heat transfer effect and reduce the flow resistance as low as possible,the flow and heat transfer characteristics of wavy fin-and-tube and wavy fin with uniform declined wavy height was numerically simulated.The local average Nusselt number and pressure drop of wavy fin with different wavy heights,and the average Nusselt number and pressure drop of wavy fin with different wavy heights at different Renolds number were analyzed.The results show that the comprehensive heat transfer performance of wavy fin with uniform declined wavy height under identical pressure drop condition and identical pumping power condition are superior to that of the wavy fin with wavy height of 2.0mm.The wavy fin with uniform declined wavy height not only ensured well heat transfer performance but also decreased the pressure drop during flow.

关 键 词：翅片管换热器 波纹翅片 翅高 换热特性 阻力特性 数值模拟 节能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]