空气横掠叉排三维外肋管束换热及流阻特性的实验研究  

Heat Transfer and Friction Characteristics for Cross-flow over Staggered External Three-dimensional Finned Tube Banks

作　　者：吴伟栋[1] 王厚华[1] 廖光亚[1] 江村[1] 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆400045

出　　处：《重庆建筑大学学报》2002年第3期53-57,共5页Journal of Chongqing Jianzhu University

摘　　要：对由重庆大学研制开发的新型三维外肋管叉排管束的换热及流动特性进行正交优化实验研究。实验结果表明 :与光管管束相比 ,在Re=2 90 0～ 1 40 0 0范围内 ,三维外肋管束的换热系数增大了 1 .5～ 2 .5倍 ,阻力增大了 1～ 3 .5倍。对实验数据进行逐步回归 ,得出了实验条件下的换热及流阻的准则方程式 ,并对肋几何参数对换热及流阻的影响进行了分析。In this paper, the heat transfer and friction characteristics for cross-flow over staggered new external three-dimensional finned tube banks developed by the Chongqing University of China are investigated by means of cross optimization experiment. The results of experiment show that the rate of heat transfer is enhanced from 1.5 to 2.5 and the ratio of pressure drop is increased from 1 to 3.5 compared to the bare tubes in the range of Reynolds numbers Re=2 900-14 000. The heat transfer and friction factor correlations are obtained through step by step regression and then, the influence of geometric parameters of fins on the characteristics of heat transfer and friction is analyzed.

关 键 词：空气横掠叉排 三维外肋管束 换热 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]