化工学报2016，Vol.67Issue(z1)：232-238,7.DOI:10.11949/j.issn.0438-1157.20160215
三螺旋折流板换热器多流路通道流动与传热数值模拟
Numerical simulation of multi-flow and heat transfer characteristics in heat exchangers with triple-helical baffles
摘要
Abstract
Triple helical baffle heat exchanger was proposed to arrange more helical baffle in shell side with large helix angle and enhance heat transfer rate.In this paper,the flow characteristics and heat transfer performance of heat exchangers with triple helical baffles were analyzed.The comprehensive performance between single-helical and triple-helical baffle heat exchangers were compared based on the calculating results of pressure drop and heat transfer coefficient when Reynolds number ranges from 1391-4174.The results showed that:heat transfer coefficient and JF factor of triple-helical baffle heat exchangers is 27.9％ higher and 13.67％00 higher than single-helical baffle heat exchanger respectively.Besides entransy dissipation theory was used to analyze the heat transfer performance of triple-helical baffle heat exchanger with different helix angle,and triple-helical baffle with 64.8° got the lowest entransy dissipation rate.The heat transfer rate of central tube and outer tube were compared,outer tube have higher heat transfer rate compared with central tube.关键词
连续螺旋折流板/换热器/三螺旋/(火积)耗散/数值模拟Key words
continuous helical baffles/heat exchanger/triple-helical/entransy dissipation/numerical simulation分类
能源科技引用本文复制引用
段振亚,沈锋,张俊梅,宋晓敏,曹兴..三螺旋折流板换热器多流路通道流动与传热数值模拟[J].化工学报,2016,67(z1):232-238,7.基金项目
山东省泰山学者工程专项 （）
山东省高等学校科技计划项目(J12 LD15).supported by the Shandong Province Taishan Scholar Engineering under Special Funding and the Science and Technology Planning Project of Shandong Provincial Education Department (J12LD15). （J12 LD15）
