高校化学工程学报2016，Vol.30Issue(2)：286-291,6.DOI:10.3969/j.issn.1003-9015.2016.00.005
基于FLUENT的内插扭带波纹管内流场分析
Flow Field Analysis of Bellows with Twist Tape Inserts Using FLUENT
摘要
Abstract
The object of the study is using CFD software FLUENT to numerically analyze the flow and heat transfer characteristics of bellows with twisted tape inserts within a Reynolds number range of 5000-60000. The convective heat transfer enhancement with different structurals and operating parameters were also investigated by combining field synergy principle. The results show that the velocity boundary layer is thinner and vortexes appear in the vicinity of the twisted tape due to its spiral effect. The secondary flows in the flow regime contribute to the convective heat transfer performance. The periodic flow is also found in bellows with twisted tape inserts. However, its pressure drop is 2~3 times higher than ordinary bellows, and the pressure drop increases with the decrease of twist ratio. The average intersection angle is small at the entrance, and it increases with the development of flow and then becomes stable. The average intersection angle also increases with the increase of entrance velocity. Compared with smooth tubes and normal bellows, the average intersection angle of bellows with twisted tape inserts decreases by about 10% and 2%, respectively, and the field synergy degree increases with the decrease of twist ratio.关键词
波纹管/扭带/传热强化/协同场分析Key words
bellow/twisted tape/heat transferaugment/field synergy analysis分类
能源科技引用本文复制引用
王晓静,李文艳,孙启蒙..基于FLUENT的内插扭带波纹管内流场分析[J].高校化学工程学报,2016,30(2):286-291,6.
