矩形通道中涡流发生器换热性能的实验研究与模拟  

Experiment and Simulation of Heat Transfer in a Rectangular Channel with Vortex Generator

作　　者：刘春江[1,2] 阮仁君 郭凯[1,2] 齐文哲 陶敏[1,2] 黄哲庆[3] Liu Chunjiang;Ruan Renjun;Guo Kai;Qi Wenzhe;Tao Min;Huang Zheqing(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;State Key Laboratory of Chemical Engineering(Tianjin University),Tianjin 300072,China;School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]天津大学化工学院,天津300072 [2]化学工程联合国家重点实验室(天津大学),天津300072 [3]西安交通大学化工学院,西安710049

出　　处：《天津大学学报（自然科学与工程技术版）》2017年第1期71-76,共6页Journal of Tianjin University：Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2012CB720500);国家自然科学基金资助项目(21406157)~~

摘　　要：通过换热实验和CFD模拟,在Re=150~1,200范围内对布置有斜截式半椭圆柱型涡流发生器的矩形换热通道内的流动和换热特性进行研究,并对其强化换热机理进行了分析.结果表明,布置有涡流发生器的换热通道较光滑通道Nu增加,压降增大,并且强化效果随Re增大而增强.在涡流发生器布置处产生了纵向涡,使截面涡量值大幅增加,从而强化了换热过程.The flow characteristics and heat transfer of the oblique-cut semi-elliptic cylinder shell in a rectangular channel with a Re range of 150—1,200 were investigated numerically and experimentally.The heat transfer augmentation mechanism was then analyzed based on the simulation results.The results show that,compared with smooth channel,Nu and pressure drop increase simultaneously in the channel with vortex generator,which has an increasingly positive effect on the heat transfer performance with the increase of Re. Moreover,it is found that the longitudinal vortex was generated around the vortex generator to increase the local vorticity,thus enhancing the heat transfer.

关 键 词：对流传热强化 涡流发生器 涡量值 流动特性 计算流体力学 

分 类 号：TK124[动力工程及工程热物理—工程热物理]