南通大学学报（自然科学版）2017，Vol.16Issue(4)：40-47,8.
过渡流下叉排圆柱列的可视化实验研究
Visualization Study on the Flow Characteristicstics of Offset Cylinder Arrays in Transitional Flow State
摘要
Abstract
The study attempted to provide theoretical reference for the design and optimization of compact heat exchanger by investigating the flow characteristics of the offset cylinder arrays in transitional flow state.The twodimensional particle image velocimetry (PIV) was adopted in visualization experiments.This research mainly focuses on offset cylinder arrays models in different transverse spacing (Ps/D =2,3,4,5,6) and different Reynolds number (Re =120,150,200) in the condition that longitudinal spacing is particular (PT =2.5D).The results show that Re and Ps have different impact on the flow characteristics of this model.With the increase of Ps,rectifying effect caused by the downstream cylinders gradually weakens in the case of constant Re.With the increase of Re,rectifying effect becomes weaker in the case of constant Ps.The acceleration effect strengthens firstly and then weakens in each Ps in the case of constant Re,which shows the characteristic of speed recovery.With the increase of Ps,the acceleration effect on downstream cylinders inflow velocity gradually strengthens.关键词
过渡流/粒子图像测速/叉排圆柱列/整流/加速Key words
transition flow/PIV/offset cylinder arrays/ectifying/acceleration分类
能源科技引用本文复制引用
张文俊,周杰,徐加辉,颜锐,喜冠南..过渡流下叉排圆柱列的可视化实验研究[J].南通大学学报（自然科学版）,2017,16(4):40-47,8.基金项目
国家自然科学基金项目(51476080) （51476080）
