化工学报Issue(3)：829-835,7.DOI:10.3969/j.issn.0438-1157.2014.03.009
三叶孔板换热器壳程流动及传热数值模拟
Numerical simulation on shell side fluid flow and heat transfer in heat exchanger with trefoil-baffles
朱凌云 1郎红方 2周帼彦 1郭震 1谭祥辉 1杨锦春 2朱冬生1
作者信息
- 1. 华东理工大学承压系统与安全教育部重点实验室，上海 200237
- 2. 深圳中广核工程设计有限公司，广东 深圳 518031
- 折叠
摘要
Abstract
Heat exchangers with trefoil-baffle are a new type heat transfer device and are widely used in nuclear power system due to their special advantages, with the fluid flowing longitudinally on the shell side. In this study, to avoid the limitation of unit duct model, a whole model for the heat exchanger with trefoil-baffles is established including inlet and outlet nozzles. Based on the RNG k-ε model, numerical simulation shell side fluid flow and heat transfer are conducted by using commercial CFD software FLUENT14.0. Characteristics of fluid flow and heat transfer performance on the shell side are analyzed. The results show that the fluid is fully developed after the first trefoil-baffle and the heat transfer coefficient and pressure drop vary periodically along the shell side. Fluid velocity increases gradually and the jet flow forms in the region near baffles. The secondary flow is also produced on two sides of baffles when the fluid flows through the trefoil-baffle. The jet flow and secondary flow can decrease the thickness of boundary layer and enhance the heat transfer.关键词
三叶孔板/换热器/壳程/模型/数值模拟Key words
trefoil-baffle/heat exchanger/shell side/model/numerical simulation分类
能源科技引用本文复制引用
朱凌云,郎红方,周帼彦,郭震,谭祥辉,杨锦春,朱冬生..三叶孔板换热器壳程流动及传热数值模拟[J].化工学报,2014,(3):829-835,7.
