矩形通道内螺旋曲面肋的强化传热及其结构优化  

Heat transfer enhancement and structural optimization of spiral warped surface fin in rectangular channel

作　　者：陈爱瑞[1] 卿德藩[1] 唐鹤文[1] 张彦[1] 金坤文[1] 

机构地区：[1]南华大学机械工程学院,湖南衡阳421001

出　　处：《化学工程》2014年第2期23-27,共5页Chemical Engineering(China)

基　　金：湖南省科技计划项目(2013GK3154);湖南省重点学科建设项目资助(湘教发[2011]76号);湖南省高校科技创新团队支持计划资助

摘　　要：研究换热器的矩形通道内设置螺旋面肋用来强化换热器的传热能力,利用Fluent仿真软件来数值模拟分析在不同结构参数(螺旋角度θ、迎流攻角β、肋横向间距P t、肋宽与肋纵向间距比v=b/s、排列方式)下,螺旋面肋对换热器传热性能以及通道内流体阻力的影响。采用正交试验优化设计螺旋面肋的结构参数,确定螺旋面肋的最佳结构参数,并实验测试在该结构参数下换热器的换热性能。数值模拟与实验结果表明:在Re=5 000,θ=35°,β=60°,P t=13 mm,v=0.65,排列方式为叉排时,换热器的综合换热性能最好。而且,实验测出优化型换热器的表面总换热系数K和压降Δp比普通型分别提高了65.7%和30.3%。Setting the helical fins in rectangular channel of heat exchanger was applied to enhance the heat transfer capability of heat exchanger. Under the different structure parameters （ such as helix angle 0, stream angle 8, fin crosswise spacing Pt, the ratio of longitudinal spacing v of fin widths and fin, arrangement mode ） , the fluent simulation software was used to simulate and analyze the effects of helical fins on the heat transfer performance of heat exchanger numerically, as well as the effects on fluid resistance. The orthogonal optimization design of structure parameters of helical fins was used to determine the optimum structure parameters of helical ribs. And the heat transfer performance of heat exchanger was also tested under the structural parameters. The numerical simulation and experimental results show that when Re=5000,θ=35°,β=60°,Pt=13mm,v=0.65, and the arrangement is staggered, the integrated heat transfer performance of the heat exchanger is the best. Moreover, the calculation of experiment indicates that the surface coefficient of heat transfer K and pressure drop Ap of the optimized heat exchanger are 65.7% and 30.3% respectively higher than those of common type.

关 键 词：矩形通道 螺旋曲面肋 结构参数 换热性能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]