换热管内置螺旋叶片阻力与传热特性的试验研究  

Experimental study on resistance characteristic and heat transfer characteristic of twisted blade inserted heat transfer tube

作　　者：郭鑫[1] 林清宇[1] 蔡广闽[1] 徐鹏[1] 林榕端[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2010年第5期719-723,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(2996001);广西自然科学基金资助项目(桂科青0447005);广西大学自然科学基金;广西研究生教育创新计划资助项目(105930903.020)

摘　　要：管壳式换热器加装内插物元件是强化传热的有效措施之一。本文提出一种新型管内强化传热技术——螺旋叶片插入物,它能够起到在线自动防垢、除垢和强化传热的双重作用。以水为工作介质,对6根不同几何尺寸的螺旋叶片试件进行流阻与传热特性试验研究。通过多元线性回归分析,推导出摩擦阻力系数及膜传热系数关联式。结果表明,螺旋叶片内插物不仅强化换热效果好,而且产生压降小。It is an effective method to enhance heat transfer performance by installing an insert in the shell-and-tube heat exchanger.This paper reported a new in-tube heat transfer enhancement technology,twisted blade insert that can remove or prevent dirt on line and enhance heat transfer performance.An experiment was carried out to study the effects of diameter of twisted blades insert on the flow resistance and heat transfer characteristics with water as the flow.Though the multivariable linear regression analysis,the correlation equations for friction resistance coefficient and heat transfer coefficient were obtained.The results showed that twisted blade insert not only has better heat transfer enhancement performance,but also produces very small pressure drop.

关 键 词：换热管 螺旋叶片 内插物 在线防垢除垢 强化传热 

分 类 号：TQ021.3[化学工程]