排数对矩形翅片椭圆管束换热的影响  

EFFECT OF ROW NUMBER ON THE HEAT TRANSFER OF ELLIPTIC TUBE WITH RECTANGULAR FINS

作　　者：张春雨[1] 李妩[1] 

机构地区：[1]华南理工大学电力学院,西安交通大学

出　　处：《华南理工大学学报（自然科学版）》1995年第10期117-122,共6页Journal of South China University of Technology(Natural Science Edition)

摘　　要：本文采用质热比拟技术，对矩形翅片椭圆管翅片表面的局部和平均传质系数进行了实验研究，由翅片表面局部传质系数的测量可以看出，管排数对翅片表面尾部回流旋涡区面积影响较大；第一排管换热系数比稳定值约低２０％；Ｒｅ数较大时，第二排管Ｓｈ数约高于稳定值６％An experimental study on the local and average mass-transfer coefficient of fin surface of elliptic tube with rectangular fins is carried out by using the naphthalene sublimation mass/heat transfer technique. By measuring the local mass-transfer coefficient of fin surface,the mechanisms of flow and convective heat transfer are analyzed.Meanwhile,the influence of tile row numbers of staggered finned tube banks on the heat transfer has been studied.

关 键 词：翅片 传质系数 管排数 换热器 换热 椭圆管 

分 类 号：TK172[动力工程及工程热物理—热能工程] TK124