螺旋翅片管束空气侧流动与换热特性研究  

Air side flow and heat transfer characteristics of spiral finned tube bundles

作　　者：楚玉杰 袁益超[1] CHU Yu-jie;YUAN Yi-chao(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《化学工程》2021年第8期28-33,44,共7页Chemical Engineering(China)

摘　　要：采用数值模拟与模化试验相结合的方法研究螺旋翅片管空冷器空气侧的流动与换热特性。分析翅片螺距、翅片高度、横向管间距、纵向管间距对换热与阻力的综合性能影响;基于正交试验原理,以Q v,Nu,Δp,f为指标,分析翅片螺距、翅片高度、横向管间距、纵向管间距对不同指标的影响程度差异,并获得各指标均较优的翅片螺距、翅片高度、横向管间距、纵向管间距的优化组合。结果表明:当其他结构参数一定时,PEC最优的翅片螺距、翅片高度、横向管间距、纵向管间距分别为3.5,6.5,67,53.69 mm;Q v,Nu,Δp,f较优的结构参数组合为翅片螺距3.5 mm、翅片高度15.5 mm、横向管间距67 mm、纵向管间距53.69 mm;与国标推荐结构相比,相同Q v时优化结构的Δp明显较小。研究成果可为空冷器螺旋翅片管束优化提供依据。The air side flow and heat transfer characteristics of spiral finned tube bundles are studied by numerical simulation and modeling test.The influence of fin pitch,fin height,transverse tube spacing and longitudinal tube spacing on the comprehensive performance of heat transfer and resistance was analyzed.Based on the principle of orthogonal test and taking Q v,Nu,Δp and f as indices,the influence of fin pitch,fin height,transverse tube spacing and longitudinal tube spacing on different indices was analyzed respectively to obtain the optimal combination of fin pitch,fin height,transverse tube spacing and longitudinal tube spacing.The results indicate that when other structural parameters are fixed,the optimal fin pitch,fin height,transverse tube spacing and longitudinal tube spacing is 3.5,6.5,67 and 53.69 mm respectively under PEC criterion.The optimal combination of Q v,Nu,Δp and f is fin pitch of 3.5 mm,fin height of 15.5 mm,transverse tube spacing of 67 mm and longitudinal tube spacing of 53.69 mm.Compared with the recommended structure of GB,the results show that under the same Q v,theΔp of the optimal structure is obviously smaller.Research results can provide a basis for the optimization of spiral finned tube bundles applied in air cooler.

关 键 词：螺旋翅片管 综合性能 正交试验 数值模拟 模化试验 

分 类 号：TK124[动力工程及工程热物理—工程热物理]