高校化学工程学报Issue(3)：417-424,8.DOI:10.3969/j.issn.1003-9015.2013.03.009
并流多通道管壳式换热器壳程流场分布比较
Fluid Flow Field Distribution Comparison of Shell-and-Tube Heat Exchanger with Multi-Parallel-Channel
摘要
Abstract
In order to solve the problems of the longitudinal flow shell-and-tube heat exchanger such as fluid flow maldistribution, high pressure drop and the overall performance deterioration, a novel structure of multi-parallel-channel inlet/outlet (MPC) was proposed. The numerical and experimental investigation on shell-side fluid flow distribution and resistance performances of the MPC heat exchanger were carried out by employing commercial CFD software of FLUENT 6.3 and Pitot tube velocimetry, respectively. Under the conditions of without FDBs (Fluid Destribute Baffles) and with FDBs of different punching ratioes, both shell-side fluid flow distribution and resistance performances were investigated under different Reynolds numbers (Re) and numbers of tube row (N) respectively. Investigation results show as follows: (1) Under the condition of without FDBs, with the decrease of N, the maldistribution of shell-side is effectively improved and the resistance performances can be reduced sharply, even more than 70%of total pressure drop can be reduced at same Re when N=11 decreases to N=7; (2) FDBs could effectively improve the shell-side fluid maldistribution, but the pressure drop will increase at the same time. (3) Comparison of different FDBs shows that the FDBs of No.1 has the best performances of fluid flow distribution at the same Re and N;(4) The main pressure drop of shell-side are generated in the region of inlet and outlet of the heat exchanger.关键词
流场分布/压降/并流多通道/管壳式换热器Key words
flow field distribution/pressure drop/multi-parallel-channel/shell-and-tube heat exchanger分类
化学化工引用本文复制引用
曾文良,邓先和..并流多通道管壳式换热器壳程流场分布比较[J].高校化学工程学报,2013,(3):417-424,8.基金项目
湖南省自然科学基金(10JJ9021)；国家自然科学基金(20776046)；表面功能结构行进制造广东普通高校重点实验室开放基金(SFS-KF201014)。 （10JJ9021）
