螺旋波纹结构对盘管换热器传热特性的影响  

Influence of spiral corrugated structure on heat transfer performance of coil tube heat exchanger

作　　者：张金成 王正方[1,2] 李凯 魏修亭[1] Zhang Jincheng;Wang Zhengfang;Li Kai;Wei Xiuting(School of Mechanical Engineering,Shandong University of Technology,Zibo 255000,China;School of Intelligent Manufacturing,Zibo Vocational Institute,Zibo 255300,China)

机构地区：[1]山东理工大学机械工程学院,淄博255000 [2]淄博职业学院智能制造学院,淄博255300

出　　处：《低温与超导》2023年第10期54-60,共7页Cryogenics and Superconductivity

基　　金：国家自然科学基金(51705297);淄博市校城融合计划项目(2018ZBXC064)资助。

摘　　要：为增强盘管换热器的传热性能,提出一种螺旋波纹状的盘管结构,通过Fluent分别对螺旋波纹盘管和普通盘管的对流换热过程进行数值模拟研究,分析入口流速对管道传热特性的影响。结果表明:两种盘管压降随入口流速的增大而升高,不同入口流速下的螺旋波纹盘管综合评价指标PEC值大于1,当入口流速为0.524 m/s时,其努塞尔数比普通盘管高出31.3%。螺旋波纹结构增强了盘管内的二次流效应,缓解了传热不均匀的现象。In order to enhance the heat transfer performance of coil heat exchanger,a spiral corrugated coil structure was proposed.The convective heat transfer processes of spiral corrugated coil and ordinary coil were numerically simulated by Fluent respectively,and the influence of inlet flow rate on the heat transfer characteristics of pipe was analyzed.The results show that the pressure drop of the two types of coils increases with the increase of inlet flow rate.The comprehensive evaluation index PEC value of the spiral corrugated coil under different inlet flow rates is greater than 1.When the inlet flow rate is 0.524 m/s,the Nusselt number of the coil is 31.3%higher than that of the ordinary coil.The spiral corrugated structure enhances the secondary flow effect in the coil and alleviates the phenomenon of uneven heat transfer.

关 键 词：螺旋波纹 FLUENT 对流换热 二次流 

分 类 号：TK172[动力工程及工程热物理—热能工程]