湿烟气工况下齿形螺旋翅片管束的性能研究  

Study on performance of serrated spiral finned tube banks under wet flue gas condition

作　　者：刘丹 成毅 胡明月 盛倩云 周昊[1] LIU Dan;CHENG Yi;HU Mingyue;SHENG Qianyun;ZHOU Hao(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,Zhejiang,China)

机构地区：[1]浙江大学能源清洁利用国家重点实验室

出　　处：《化工学报》2020年第2期575-583,共9页CIESC Journal

基　　金：国家杰出青年科学基金项目(51825605)

摘　　要：换热器烟气侧自身结构参数和外界条件是影响换热器换热及阻力特性的主要因素,采用数值模拟和实验方法研究了翅片螺距及烟气含水量对齿形螺旋翅片管束换热及阻力特性的影响。结果表明,在翅片螺距3.63~8.47 mm范围内,烟气侧Nu随着翅片螺距的增大而增大,在不同入口烟温下,相对于3.63 mm翅片管,5.08 mm和8.47 mm翅片管Nu分别增大3%~6%和9%~14%,Eu随着翅片螺距的增大而减小,相对于3.63 mm翅片管,5.08 mm和8.47 mm翅片管Eu分别减小30%和50%左右;烟气含水量的适当增大,有利于提高齿形翅片管束的换热及阻力特性。The effect of fin arrangements and operating conditions has significance for the flue gas side performance characteristics of finned tube heat exchangers.The effects of fin pitches and water vapor content on the flow resistance and heat transfer characteristics of serrated spiral finned tube banks were investigated by using numerical simulation and experimental method.The results showed that the Nusselt number Nu increases with the increase of fin pitch when fin pitch ranges from 3.63 mm to 8.47 mm.Under different inlet flue gas temperatures,the Nu of 5.08 mm and 8.47 mm are higher than that for 3.63 mm by about 3%-6%and 9%-14%,respectively,while the Euler number Eu decreases with the increase of fin pitch,when fin pitch increases from 3.63 mm to 8.47 mm,Eu decreases by about 30%(for 5.08 mm)and 50%(for 8.47 mm).Appropriate increase of moisture content of flue gas is beneficial to improve heat transfer and resistance characteristics of toothed finned tube bundles.

关 键 词：传热 翅片螺距 烟气含水量 换热特性 阻力特性 数值模拟 优化 

分 类 号：TK124[动力工程及工程热物理—工程热物理]