化工学报2016，Vol.67Issue(4)：1200-1206,7.DOI:10.11949/j.issn.0438-1157.20151179
翅片螺距对折齿型螺旋翅片管束性能的影响
Effects of fin pitch on heat transfer and flow resistance of twisted-serrated spiral finned tube banks
王学刚 1袁益超1
作者信息
- 1. 上海理工大学上海市动力工程多相流动与传热重点实验室，上海 200093
- 折叠
摘要
Abstract
In order to improve the heat transfer enhancement of serrated spiral-finned-tube, twisted-serrated spiral finned tube was fabricated by changing the deflection angle and the twisted direction of serration. Twisted-serrated spiral finned tube banks with the diameters of 38 mm and 51 mm were researched by numerical simulation combined with modeling experiments. The influence of fin pitch on heat transfer and resistance characteristics of twisted-serrated spiral finned tube was obtained. The results showed thatNu at air-side increased firstly and then decreased with the increase of fin pitch from 3.63—8.47 mm. The effects of fin pitch onNu at air-side was weaker when the fin pitch was larger than 6.35 mm.Eu at air-side decreased with increasing fin pitch. For twisted-serrated spiral finned tube banks with the diameters of 38 mm and 51 mm, comprehensive performance indexNu·f−1/3 was the maximum when the fin pitch is 6.35 mm. Thus, Pf=6.35 mm was the optimum fin pitch within the range of 3.63—8.47 mm.关键词
传热/折齿型螺旋翅片管/翅片螺距/换热性能/阻力性能/数值模拟/优化Key words
heat transfer/twisted-serrated spiral finned tube banks/fin pitch/heat transfer characteristic/resistance characteristic/numerical simulation/optimization分类
能源科技引用本文复制引用
王学刚,袁益超..翅片螺距对折齿型螺旋翅片管束性能的影响[J].化工学报,2016,67(4):1200-1206,7.
