新型鸟喙式涡流发生器强化传热数值模拟  

NUMERICAL SIMULATION OF ENHANCED HEAT TRANSFER INNEW TYPE OF BIRD BEAK VORTEX GENERATOR

作　　者：牛壮 郝敏[1] 王玉鑫[1] 张佳亮 Niu Zhuang;Hao Min;Wang Yuxin;Zhang Jialiang(College of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,沈阳110142

出　　处：《太阳能学报》2024年第6期264-271,共8页Acta Energiae Solaris Sinica

基　　金：辽宁省自然科学基金(2019MS259)。

摘　　要：将仿生鸟喙式结构引入涡流发生器中,结合Fluent软件在Re=6000~26800范围内对其换热能力j、流动阻力f与综合热性能C_(PEC)变化规律进行研究。结果表明:鸟喙式涡流发生器是一种高换热低流阻的高效换热元件,在Re=13000时C_(PEC)较传统矩形翼提高62.35%。此外其综合热性能随着迎流攻角α的增大先增大后减小,在α=30°时达到最大,较空通道提高26.83%。增大斜截角度β是降低流动阻力的一种有效方式,β=24°的结构较无截角结构流阻f降低47.03%。Installing vortex generators on the fins can significantly improve the shell-side heat transfer efficiency of shell-and-tube heat exchangers,but the improvement of heat transfer capacity often leads to the increase of flow resistance.Therefore,most of the traditional vortex generators have the problem of low comprehensive efficiency with high heat transfer and high flow resistance.In this study,the bionic bird beak structure was introduced into the vortex generator,and the heat transfer capacity j,flow resistance f and comprehensive thermal performance C_(PEC)were studied in the range of Re=6000-26800 by Fluent software.The results show that the bird-beak vortex generator is an efficient heat transfer element with high heat transfer and low flow resistance.When Re=13000,the C_(PEC)is 62.35%higher than that of the traditional rectangular wing.In addition,its heat transfer capacity will increase first and then decrease with the increase of the angle of attackα,reaching the maximum atα=30°,which is 26.83%higher than that of the empty channel.Increasing the oblique cut angleβis an effective way to reduce the flow resistance.The flow resistance f of the structure withβ=24°is 47.03%lower than that of the structure without cut angle.

关 键 词：数值模拟 换热性能 导热系数 涡流发生器 综合热性能 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]