摘要
阐述了换热器管程强化传热强化管和管内插入物两种结构及其性能特点,并用场协同原理和数值模拟方法分析了其强化传热机理。模拟分析的结果为:光滑管内,速度矢量与温度矢量二者之间的夹角接近90℃,传热效果较差;在管内插入物情况下,两者之间的夹角小于90℃,流场和温度场的协同性更好,从而实现了强化传热。
There are various kinds of structures for tubeside heat transfer enhancement of heat exchanger,which can be classified as two types of enhanced tubes and insertsThis paper presents the characteristics of structures and performance of various enhanced heat transfer techniques,and analyzes their enhanced heat transfer mechanisms with field synergy principle and numerical simulation methodThe results indicates that the enhanced tubes can disturb fluid flow and break up boundary layer,and that the inserts can promote turbulence degree and radial admixture of fluid,as are propitious to increase heat transfer intensity
出处
《低温与特气》
CAS
2003年第5期24-26,共3页
Low Temperature and Specialty Gases
关键词
强化管
插入物
强化传热
数值分析
enhanced tube
insert
enhanced heat transfer
numerical analysis