叉排翅片传热特性的二维与三维数值分析  

2D and 3D Numerical Analysis on Heat Transfer Performance of the Offset Strip Fin

作　　者：魏玉珍[1] 喜冠南[1] 

机构地区：[1]南通大学机械工程学院,江苏南通226019

出　　处：《机械设计与制造》2018年第2期124-127,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51476080);南通市传热强化与过程节能重点实验室项目(CP12012004)

摘　　要：换热器是一种广泛应用于工业生产的设备,而叉排翅片(OSF)因具有良好的换热性能而被广泛应用于换热器。目前基于二维(2D)与三维(3D)数值方法,针对OSF流动传热特性已展开了大量研究。为了进一步加深对实际边界条件下的OSF传热特性的研究,通对层流和过渡流下的OSF进行2D与3D的非定常数值分析,找出二者在预测换热性能方面的差异并分析导致差异的影响因素,从而寻找一种利用2D或3D数值方法模拟OSF流动传热特性的有效途径,研究结果表明:在层流区3D效应较小,采用2D数值方法可更为有效地对理想的OSF传热特性进行定性和定量的预测;在过渡流区3D效应加强,由于OSF底板边界层对非定常流的抑制作用,2D数值分析方法不能准确地预测OSF的传热性能。Heat exchangers are the equipments widely used in industrial praduction and the offset strip fin（ OSF） is commonly used in heat exchangers for the good thermal performances. Based on two-dimensional （2D） and three-dimensional （3D） numerical computations, a large number of studies have been carried out on the flow and heat transfer characteristics of the OSE In order to further study the heat transfer perormance of the OSF with realistic boundary conditions, 2D and 3D for the OSF in the unsteady laminar and transition flow regions were carried out in the present study. The differences in prediction of heat？exchangers＇ performances were found and then the reasons were analyzed. As a result, how to simulate the heat transfer characteristics of the OSF effectively by 2D or 3D numerical analysis can be found. Results show that： The 3D effect is smaller in the laminar flow region and it is more effective to use 2D computation to predict the idealized OSF heat transfer performances qualitatively and quantitatively. However, the 3D effect becomes significant in the transition flow. Due to the suppression of boundary layer from plates for the unsteady flow, the 2D computation is inaccurate to predict the heat transfer performances of the OSF.

关 键 词：换热器 叉排翅片列 2D数值分析 3D数值分析 优化设计 

分 类 号：TH16[机械工程—机械制造及自动化] TK172[动力工程及工程热物理—热能工程]