哈尔滨工程大学学报2024，Vol.45Issue(3)：599-606,8.DOI:10.11990/jheu.202111027
并列切角方柱风致干扰效应的大涡模拟研究
Interference effect of side-by-side chamfered square cylinders by large eddy simulation
摘要
Abstract
Considering the Reynolds number of 22 000,the large eddy simulation method is used to study the inter-ference effect of side-by-side chamfered square cylinders with a chamfer angle of 10%under the condition of uni-form flow field.This was done with the goal of identifying the interference effect of side-by-side high-rise buildings with chamfered corners.Based on the grid convergence analysis of the model and the validation of the accuracy of the model,the aerodynamic interference effect and the flow field distribution of side-by-side chamfered square cyl-inders with different spacing ratios were analyzed,and the influence law and formation mechanism of wind pressure interference effect were explored.The results revealed that for the side-by-side chamfered square cylinders,the av-erage drag coefficient mainly showed an amplification effect,while the fluctuating lift coefficient had a reduction effect.When side-by-side chamfered square cylinders were at a small interval(B/L=1.2),the interaction be-tween wind and the wall produced wind pressure,and the superposition of wind pressure and the surface force of square columns produced a strengthening effect on the positive pressure area,which manifested as an amplification effect.At the same time,the region of negative pressure was weakened,and a decreasing effect appeared.When B/L=1.5,the structure interference was the most severe,among which the amplification effect was obvious at the corner of the flow field behind the adjacent facades,with the maximum value of the interference factor being 2.58.When B/L≥4.0,the interference effect of facades(other than the adjacent ones)and chamfer angles disap-peared.Finally,when B/L=8.0,28%amplification still existed in adjacent facades.关键词
并列切角方柱/大涡模拟/均匀流场/气动干扰效应/流场分布/风压干扰效应/阻力系数/放大效应Key words
side-by-side chamfered square cylinders/large eddy simulation/uniform flow field/aerodynamic coeffi-cient effect/flow field distribution/interference effect/dray coefficient/explored分类
建筑与水利引用本文复制引用
李方慧,张智博,张特,范佳红,尚靖淳..并列切角方柱风致干扰效应的大涡模拟研究[J].哈尔滨工程大学学报,2024,45(3):599-606,8.基金项目
国家自然科学基金项目(51778492) （51778492）
2022年度黑龙江省省属高等学校基本科研业务费项目. （）
