帘式折流片换热器壳程流体流动死区研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: Research onFlow DeadZonesin Shell Side ofShutter BaffleHeat Exchanger

作者:: 古新; 郝建设; 刘敏珊; 等.; 郑州大学河南省过程传热与节能重点实验室,河南郑州,450001, 郑州大学河南省过程传热与节能重点实验室,河南郑州,450001, 郑州大学河南省过程传热与节能重点实验室,河南郑州,450001, 郑州大学河南省过程传热与节能重点实验室,河南郑州,450001

Author(s):: GUXin; HAO Jian-she; LIUMin—shan; ZHU Pei—na; Key Laboratory ofProcess Heat Transfer and Energy Savingof HenanProvince，Zhengzhou University，Zhengzhou450002，China)

摘要:: 为掌握新型高效帘式折流片换热器壳程流动死区分布规律,采用CFD方法得到该换热器中停留时间分布(RTD)数据,研究表明:帘式折流片换热器壳程流动死区大小随着Re的增加而降低;流动死区分布规律受折流栅排列方式的影响,相同壳程Re下,折流栅对称排列时死区大于折流栅同向排列时的死区,且均小于折流板换热器壳程流动死区,当Re=5 000,10 000,15 000时,折流栅对称排列时帘式折流片换热器壳程死区分别为折流板换热器壳程死区的59.23％、49.08％、46.06％;折流栅同向排列时分别为折流板换热器壳程死

Abstract:: In orderto grasp the distribution rule offlow dead zone in shell side of shutterbaffle heat exchanger，which is a newand high efficiency heat exchanger，the residence time distribution(RTD)datawas ob— tained and used to analysis by using CFD in this paper．The results showed that the size of flow dead zone in shell side of shutterbaffle heat exchangerwas reducedwith increase of Reynolds number．Thedistribution of flow dead zone wasinfluenced by assemble types of shutter baffles．When the shutter baffle symmetrical arrangement the size of flow dead zone is larger than that of CO—rotating at the same Reynolds number，and the size offlow deadzone ofshutterbaffle heat exchanger is less than that of baffle plate heat exchanger．When Re =5000、Re=10 000and Re=15 000，the dead zone in shell side ofshutter baffle heat exchanger with shutter baffle symmetricalarrangement are respectively 59．23％、49．08％、46．06％of that in baffle plate heat ex— changer，and the dead zone in shell side of shutter baffle heat exchanger with shutter baffle CO—rotating ar— rangement are respectively 29．94％、25．32％、19．80％of that in baffle plate heat exchanger．