折流板换热器的流场数值模拟与结构优化  

Numerical simulation of structural optimization for baffle heat exchanger

作　　者：刘敏珊[1] 董其伍[1] 刘乾[1] 

机构地区：[1]郑州大学热能工程研究中心

出　　处：《石油机械》2006年第4期42-45,共4页China Petroleum Machinery

基　　金：河南省杰出人才创新基金资助项目(0221000600)。

摘　　要：基于多孔介质与分布阻力的概念,采用FLUENT软件对单弓形折流板换热器的壳程流场进行了三维数值模拟,模拟结果与实验结果吻合较好。在此基础上针对折流板换热器壳程压降大、能耗高,存在传热死区等的缺点提出了壳程流场的改进方案,即在增加折流板缺口高度的同时,再加入2块分隔板。通过数值模拟可以看到壳程流场改进后不仅具有压降低、场协同性能好、基本无传热死区等特点,而且在一定程度还提高了管束抗流体诱导振动的性能。Based on the concept of porous media and distributed resistance, software FLUENT is used to conduct a 3D numerical simulation on the flow field of shell side of a single segmental baffle heat exchanger. The result is consistent with that of experiment. On the basis stated above, in consideration of the insufficient of high pressure drop and high energy consumption in the shell side of the baffle heat exchanger and existence of a dead area of heat transfer, a scheme for improving shell-side flow field is proposed, that is the height of notch in the baffle should be raised, at the same time 2 separating plates should be added. It can be seen from the numerical simulation that the improved baffle has the characteristics of low pressure drop, good field synergy and basically no dead area existence for heat transfer, and the performance of resistance for vibration of pipe bundle induced by fluid is raised at certain extent.

关 键 词：单弓形折流板换热器 数值模拟 壳程强化传热 结构优化 

分 类 号：TQ051.5[化学工程] TV131.4[水利工程—水力学及河流动力学]