华南理工大学学报（自然科学版）2025，Vol.53Issue(2)：136-148,13.DOI:10.12141/j.issn.1000-565X.240266
流线型构件对TTU模型风荷载影响的大涡模拟研究
LES Study on the Influence of Streamlined Accessories on the Wind Loads of TTU Model
摘要
Abstract
The high extreme negative pressure that occurs in the corner area of the roof of a low-rise building is the fo-cus of the wind-resistant design of its envelope.Based on the aerodynamic principle and the standard building model of TTU(Texas Tech University),this paper designed a new streamlined add-on accessories in the corner area of roof ac-cording to the wind flow patterns in the roof corner.By altering parameters such as the height and length of additional components,it conducted a comparative study involving rigid model pressure measurements in wind tunnel tests under 10 working conditions and Large Eddy Simulation(LES).The study aimed to explore the impact of these new types of additional components on wind loads in roof corner zones,aerodynamic optimization for wind resistance of roofs,and the accuracy of LES simulations.The study shows that:1)the wind tunnel test results show that the installation of add-on accessories in the roof corner area can effectively reduce the extreme negative pressure in the corner area,and the most unfavorable mean negative pressure in the roof corner area can be reduced by 10%,and the most unfavorable extreme negative pressure can be reduced by 25%under the 10 working conditions studied;2)the NSRFG(Narrowband Synthe-sis Random Flow Generation)method is used to generate the inlet turbulence,and the wind load distribution pattern in the TTU model under various conditions is obtained by the LES simulation.Although the absolute value of the mean wind pressure coefficient of the roof under some working conditions simulation results are larger(the mean error is 13.88%),and the extreme wind pressure coefficient is smaller(the mean error is 9.72%),it is overall consistent with the wind tunnel test,indicating that the NSRFG method has good accuracy;3)LES numerical simulation parameter study shows that the influence of the length of the add-on accessories on the wind load in the roof corner area is greater than that of the height,the extreme wind pressure coefficient in the roof corner area decreases by 6.15%after the height of the equal length add-on accessories increase by 1 times;the extreme wind pressure coefficient in the roof corner area decreases by 10.77%after the length of the equal height add-on accessories increase by 0.8 times.关键词
低矮建筑/风荷载/大涡模拟/风洞试验/优化设计Key words
low-rise building/wind load/large eddy simulation/wind tunnel test/optimization design分类
建筑与水利引用本文复制引用
杨易,王喆,张之远..流线型构件对TTU模型风荷载影响的大涡模拟研究[J].华南理工大学学报（自然科学版）,2025,53(2):136-148,13.基金项目
国家自然科学基金项目(52178480) （52178480）
广东省基础与应用基础研究基金项目(2022A1515010350) （2022A1515010350）
亚热带建筑与城市科学全国重点实验室项目(2024ZB10) Supported by the National Natural Science Foundation of China(52178480)and the Guangdong Province Basic and Applied Basic Research Fund Project(2022A1515010350) （2024ZB10）
