制冷技术2023，Vol.43Issue(4)：22-27,39,7.DOI:10.3969/j.issn.2095-4468.2023.04.104
三维低肋管管内对流换热性能的实验研究
Experimental Study on Convection Heat Transfer Performance of Three-dimensional Enhanced Low Fin Tube
黄兴华 1夏鹏1
作者信息
- 1. 上海工程技术大学机械与汽车工程学院,上海 201620
- 折叠
摘要
Abstract
In the present investigation,an experimental study is carried out on a flooded evaporator with double-sided enhanced boiling tubes.The enhanced tube has two spiral fins with different heights in tube side,which are distributed in a cross shape.The conventional Wilson separation method,the extended Gnielinski separation method and a nonlinear fitting method are used to calculate the convection surface heat transfer coefficient inside the tube.The results show that for the three-dimensional enhanced tube with two cross fins of different heights,the results of the extended Gnielinski separation method and the nonlinear fitting method are very close and reasonable,while the results of the Wilson separation method have large deviations,indicating that the extended Gnielinski separation method can be used to calculate the convection surface heat transfer coefficient of the enhanced tube.At a flow velocity of 2 m/s in the tube,the enhancement factor of the tube side surface heat transfer coefficient of the enhanced tube is 3.5,and the pressure drop is 2.6 times that of a smooth tube.关键词
三维强化管/沸腾换热/对流换热/Wilson分离方法/满液式蒸发器Key words
Three-dimensional enhanced tube/Boiling heat transfer/Convection heat transfer/Wilson separation method/Flooded evaporator分类
通用工业技术引用本文复制引用
黄兴华,夏鹏..三维低肋管管内对流换热性能的实验研究[J].制冷技术,2023,43(4):22-27,39,7.
