带扰流孔的矩形翅片表面换热机理的实验研究  

EXPERIMENTAL STUDY ON THE MECHANISM OF HEAT AND MASS TRANSFER FOR RECTANGULAR FIN WITH INTERRUPTING HOLES

作　　者：李妩[1] 张春雨[1] 

机构地区：[1]西安交通大学,华南理工大学

出　　处：《西安交通大学学报》1994年第6期80-85,共6页Journal of Xi'an Jiaotong University

摘　　要：采用质热比拟技术，对带扰流孔的矩形翅片椭圆管翅片表面的局部和平均传质系数进行实验研究，通过对翅片表面局部传质系数的测定，揭示了翅片表面气流的流动和对流换热机理，以及扰流孔对单排管翅片表面换热的影响，结果表明，在一定参数下，增加扰流孔数可使换热强化，但中间位置的扰流孔对换热起的作用不大。The local and average mass transfer coefficients for rectangular fin with interruptingholes finned on an ellipticaI tube are investigated experimentally via naphthelene sublimationtechnioue. The mechanism of fluid flow and convective heat transfer on the fin surface , andthe effects of the interrupting holes are studied through the meassurement of local heat trans-fer coemcients. It is found that in some cases, heat transfer can be enhanced with the in-creasing of interrupting hole number but the middle interrupting holes almost have no effecton heat transfer.

关 键 词：翅片 传质系数 椭圆管 换热器 换热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]