文献类型：期刊文献

中文题名：折流板切口方向对管壳式换热器传热性能影响

英文题名：Effect of baffle orientation on heat transfer performance of shell-and-tube heat exchangers

作者：文宏刚[1];周帼彦[1];朱冬生[1];覃新川[1]

机构：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237

年份：2012

卷号：40

期号：4

起止页码：23

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：教育部交叉学科与重大项目培育基金(WG1013009)

语种：中文

中文关键词：管壳式换热器;数值模拟;传热系数;压降

外文关键词：shell-and-tube heat exchanger; numerical simulation; heat transfer coefficient; pressure drop

摘要：为了研究单弓形折流板的切口方向对管壳式换热器传热与流动性能的影响,文中通过建立3个不同折流板切口方向的管壳式换热器简化实体模型,运用CFD软件Fluent对管壳式换热器壳程传热与流动状态进行了三维数值模拟。以水为壳程流体介质,在不断改变壳程进口流速,使得壳程进口雷诺数Re在10 000到70 000范围内变化时,得到了不同状态下的壳程流场与温度场。根据数值模拟结果,以总传热系数α,壳程总压降Δp以及单位压降下的传热系数α/Δp作为综合衡量标准,分析不同折流板切口方向时的管壳式换热器壳程流场与温度场。数值模拟分析结果表明:折流板为垂直切口方向时,管壳式换热器总传热系数最大,压降最小,综合性能最好,另外2种折流板切口方向的管壳式换热器综合性能差不多。
In order to study the effect of baffle orientation on the heat transfer and pressure drop in a shell-and-tube heat exchanger,three simplified physical models of shell-and-tube heat exchanger with different baffle orientation were built for three dimensional numerical simulation.The shellside turbulent flow and heat transfer characteristics of shell-and-tube heat exchanger were studied by using computational fluid dynamics（CFD） software Fluent.With water as fluid medium,the pressure fields and temperature fields of shellside at different shellside flow rates were gained by constantly changing the shellside inlet flow rates to keep Reynolds numbers ranging from 10 000 to 7 000.According to the numerical simulation results,the performance of three shell and tube heat exchanger models was compared and assessed by using heat transfer coefficient α,pressure drop Δp,and the comprehensive performance factor α/Δp.The results show that when the baffle orientation is in vertical,the total heat transfer coefficient of shell-and-tube heat exchanger is the maximum,pressure drop is the smallest and the comprehensive performance is the best.Moreover,the vertical baffle orientation seems to be more advantageous than two others.