东南大学学报（自然科学版）2026，Vol.56Issue(3)：443-451,9.DOI:10.3969/j.issn.1001-0505.2026.03.013
不同风攻角4∶1矩形柱绕流大涡模拟
Large-eddy simulation of flow around a 4∶1 rectangular cylinder at various attack angles
摘要
Abstract
Using the large eddy simulation method,the overall aerodynamic parameters,surface pressure dis-tribution,mean flow characteristics,and transient flow features of a 4∶1 rectangular cylinder were studied at attack angles of α=0°-12°,Reynolds number of 1.1×10⁴,and a uniform inflow condition.The attack angle effects of the aerodynamic performance and flow field characteristics of the rectangular cylinder,as well as their flow mechanisms,were analyzed.At small attack angles α=0°-1°,the flow around the rectangular cyl-inder exhibits a reattachment flow pattern of the separated shear layers on the upper and lower surfaces,and shows a higher symmetry of the flow field.The mean and fluctuating aerodynamic force coefficients are rela-tively small.At large wind attack angles α=3°-12°,the separated shear layer remains reattaching to the upper surface,while the lower surface does not show stable reattachment,forming large recirculation zones on the lower side and in the wake.As the attack angle increases,the absolute values of the mean aerodynamic force coefficients generally show an increasing trend,and the Strouhal number decreases.Under large attack angles,the 4∶1 rectangular cylinder is subjected to stronger and longer-period cross-flow aerodynamic forces,which may induce vortex-induced vibrations(VIV)or alter the lock-in wind speed interval and amplitude of VIV.关键词
桥梁抗风/矩形柱/风攻角/大涡模拟/气动性能/流场特性Key words
bridge wind resistance/rectangular cylinder/attack angle/large eddy simulation/aerodynamic performance/flow characteristics分类
交通工程引用本文复制引用
董浩天,王亚松,许庆,杜晓庆..不同风攻角4∶1矩形柱绕流大涡模拟[J].东南大学学报（自然科学版）,2026,56(3):443-451,9.基金项目
国家自然科学基金资助项目(52478534,52008239,51978392) （52478534,52008239,51978392）
桥梁结构抗风技术交通行业重点实验室开放课题基金资助项目(KLWRTBMC24-02) （KLWRTBMC24-02）
福建省住建厅科学技术计划资助项目(2025-K-19). （2025-K-19）
