摘要
针对弓形折流板管壳式换热器流动死区大和阻力高的问题,提出了使用新型垂直布置百叶折流板管壳式换热器。建立垂直布置百叶折流板换热器三维数理模型,对其流动结构、传热和阻力性能进行研究分析,获得垂直布置百叶折流板换热器三维流场和温度分布;与传统弓形折流板换热器的传热和阻力性能进行了对比;同时,具体分析了不同折流板倾角对其性能的影响。研究结果表明:垂直布置百叶折流板换热器壳侧流场分布均匀,其流动死区小,流动阻力低;与传统弓形折流板换热器相比,其壳侧压降降低了10.06%~45.10%;而倾斜角度为45°时,综合性能最高,其单位压降下的传热系数比传统弓形折流板换热器提高了38.62%~51.43%.
In order to to solve the problems of large dead zones and high resistance of the shell-and-tube heat exchanger with segmental baffles,a novel shell-and-tube heat exchanger with vertical layout louver baffles was proposed.The three-dimensional numerical model of the heat exchanger with vertical layout louver baffles was established,and its flow structure,heat transfer,and resistance performance were investigated.The three-dimensional flow field and temperature distribution of the shell-and-tube heat exchanger with vertical layout louver baffles were obtained.The heat transfer and resistance performance were compared with those of traditional heat exchanger with segmental baffles,and the influence of the angle of the baffles on the performance of the heat exchanger was analyzed in detail.The results show that the flow field in the shell side of the heat exchanger with vertical layout louver baffles is evenly distributed.Compared with the heat exchanger with segmental baffles,the heat exchanger with vertical layout louver baffles has less dead zone,lower flow resistance,and the pressure loss in shell side is decreased by 10.06%-45.10%.The heat transfer coefficient per unit pressure drop of the heat exchanger with vertical layout louver baffles is increased by 38.62%-51.43%for the 45°louver baffles.
作者
王志鹏
雷勇刚
杜保存
李亚子
王飞
WANG Zhipeng;LEI Yonggang;DU Baocun;LI Yazi;WANG Fei(College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
出处
《太原理工大学学报》
CAS
北大核心
2020年第6期912-917,共6页
Journal of Taiyuan University of Technology
基金
国家自然科学基金资助项目(U1510136)
山西省回国留学人员科研资助项目(2016-031)。
关键词
百叶折流板
数值模拟
管壳式换热器
传热
压降
Louver baffles
Numerical simulation
Shell-and-tube heat exchanger
Heat transfer
Pressure drop
