空气动力学学报2011，Vol.29Issue(3)：270-279,10.
三维钝体结构风压分布与绕流特性的大涡模拟研究
Numerical study on pressure and flow characteristics of three-dimensional bluff body by LES
摘要
Abstract
This paper investigated resistance characteristics and spatial wind-pressure distribution characteristics of three-dimensional rectangular bluff body by large eddy simulation (LES). Both mean and fluctuating wind velocity were calculated and adopted as inlet boundary condition to improve accuracy and credibility of numerical simulation.Pressure distributions and vertical and lateral velocity profiles of different models were then investigated and assessed separately in detail. Results show that wind profiles of weak regions are influenced mostly. Influence intensity of flow around bluff bodies shows a gradual decrease from the middle to both sides. Stable mean pressure coefficients can be observed on the front faces. Asymmetric eddy generation and separation in weak regions will have significant influence on the flow impact, separation, and reattachment of both sides of bluff body. The weak regions have the least influence areas in cases of α =45° or α = 135°, and then increase gradually when is closing to α =0°, α =90° and e =180°.关键词
大涡模型/计算流体动力学/绕流特性/风压分布/瞬态动力分析Key words
large eddy simulation/ computational fluid dynamics/ flow fields/ pressure distribution/ transient dynamic analysis分类
建筑与水利引用本文复制引用
汪大洋,周云,谭平..三维钝体结构风压分布与绕流特性的大涡模拟研究[J].空气动力学学报,2011,29(3):270-279,10.基金项目
高等学校博士点学科专项基金(20061078001,200810780001) （20061078001,200810780001）
广东省自然科学基金(8351009101000001) （8351009101000001）
广州市教育系统创新团队项目(09T003) （09T003）
