并流多通道管壳式换热器壳侧流场数值研究  

Numerical investigation on shell-side fluid flow distribution of shell and tube heat exchanger with multi parallel channel

作　　者：曾文良[1,2] 邓先和[1] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室,广东广州510640 [2]衡阳师范学院功能金属有机材料湖南省普通高等学校重点实验室,湖南衡阳421001

出　　处：《化学工程》2011年第1期23-27,共5页Chemical Engineering(China)

基　　金：教育部强化传热与过程节能重点实验室开放基金(KF0706)

摘　　要：采用多孔介质-分布阻力模型,对一种新型并流多通道进出口结构(MPC)轴流管壳式换热器壳程流场进行数值研究。在传热管长6.0 m不变,分别针对长径比L/D=2.0和L/D=1.5二种情况,研究Re和通道数N对壳侧流场的分布及阻力变化规律。结果表明:在相同的Re和L/D下,随着N的增加,壳程的流场分布不均现象得到有效的遏制,壳程压降将急剧降低,最大降幅达到50%以上;当L/D不变时,Re的变化对壳程流场分布影响极小。The numerical investigation on shell-side fluid flow distribution of a novel longitudinal flow shell-and-tube heat exchanger with multi-parallel-channel（MPC） inlet and outlet was presented by using porous media and distributed resistance model.Under the condition of constant heat transfer tube length L=6.0 m,such characteristics as shell-side fluid flow distribution and pressure drop performance were investigated with different Reynolds number Re and the number of MPC（N） at the ratio of tube length to diameter L/D=2.0 and L/D=1.5,respectively.Investigated results show that with the increase of N,the maldistribution of shell-side is effectively improved and the pressure drop is dramatically reduced,even the maximum pressure drop is more than 50%,under the condition of constant Re and constant L/D.But with the change of Re,maldistribution of shell-side has little change under the condition of constant L/D.

关 键 词：流场分布 压降 管壳式换热器 并流多通道 

分 类 号：TQ051.5[化学工程] TK172[动力工程及工程热物理—热能工程]