摘要
为研究工程应用中蜂窝夹套的传热性能问题,采用FLUENT 17.0软件对短管分别按三角形和正方形排列的短管蜂窝夹套以及整体夹套内的流场进行模拟分析,研究不同截面处速度和温度分布情况,比较整体夹套与蜂窝夹套的传热性能,探究不同短管间距s和短管长径比l/d对传热性能的影响。结果表明,三角形排列的短管蜂窝夹套传热效果更好;随短管间距s不断减小,短管长径比l/d不断增大,扰流效果更好且流动死角区域减少,整体温度分布趋于均匀化;在相同条件下,可通过增加短管长度提高传热效果,对工程设计具有一定的指导意义。
Aiming at the heat transfer performance of honeycomb jacket in engineering application, FLUENT 17.0 was used to simulate the flow field in the square and triangular short-tube honeycomb jacket and the whole jacket, and the velocity distribution and temperature distribution at different sections were studied. The heat transfer performance of the whole jacket and the honeycomb jacket was compared, and the effects of different short tube spacing s and short tube length-diameter ratio l/d on the heat transfer performance were investigated. The results show that heat transfer effect of triangular short-tube honeycomb jacket is better. When the short pipe spacing s decreases, the short tube length-diameter ratio l/d increases continuously, the spoiler effect is better, the flow dead zone reduces, and the overall temperature distribution becomes uniform. Under the condition of the same diameter, the measure to increase the short tube length can be taken to improve the heat transfer performance, which provides a certain guiding significance for engineering design.
作者
刘林波
董金善
史为帅
张正峰
周瑞均
LIU Lin-bo;DONG Jin-shan;SHI Wei-shuai;ZHANG Zheng-feng;ZHOU Rui-jun(College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《石油化工设备》
CAS
2020年第1期1-9,共9页
Petro-Chemical Equipment
关键词
反应容器
蜂窝夹套
短管
结构参数
传热性能
有限元模拟
reaction vessel
honeycomb jacket
short tube
structural parameter
heat transfer performance
finite element simulation
