化学工程2011，Vol.39Issue(2)：18-21,4.
扭曲管强化传热性能实验研究
Experimental investigation on heat transfer enhancement of twisted tube
于洋 1朱冬生 1曾力丁 1邹静1
作者信息
- 1. 华东理工大学,机械与动力工程学院,承压系统安全科学教育部重点实验室,上海,200237
- 折叠
摘要
Abstract
The heat transfer and flow friction performance of 5 twisted elliptical tubes with different screw pitch and smooth tube were tested on the basis of designed vapor-water exchange experimental apparatus. The change trend of Nnsselt number, the friction factor, the comprehensive function evaluation factor, and Reynolds number of innertube liquid of 5 twisted elliptical tubes with different screw pitch and smooth tube were compared. The results indicate that the heat transfer of twisted elliptical tubes are more effective. The shorter screw pitch it is, the better heat transfer enhancement it is. The Nusselt number of the twisted tube is about 1.05-1.4 times that of smooth tube, and the friction factor of the twisted tube is about 1.1-1.4 times that of smooth tube in a testing range of Reynolds number. Based on the experimental data, the empirical criterion equation of heat transfer and pressure drop inside tube is ruled out, which can be referred in engineering design.关键词
扭曲管/强化传热/流动阻力/管内传热与阻力关联式Key words
twisted tube/ heat transfer enhancement/ flow friction/ empirieal criterion equation of heat transfer and pressure drop inside tube分类
能源科技引用本文复制引用
于洋,朱冬生,曾力丁,邹静..扭曲管强化传热性能实验研究[J].化学工程,2011,39(2):18-21,4.
