不同宽度比串列方柱流场和气动力特性研究  

RESEARCH ON THE FLOW FIELD AND AERODYNAMIC CHARACTERISTICS BETWEEN DIFFERENT WIDTH RATIOS OF TANDEM SQUARE CYLINDERS

作　　者：张欣怡 李方慧[1] 范佳红 寇佳茵 尚靖淳 隋京航 ZHANG Xinyi;LI Fanghui;FAN Jiahong;KOU Jiayin;SHANG Jingchun;SUI Jinghang(School of Civil Engineering,Heilongjiang University,Harbin 150086,China)

机构地区：[1]黑龙江大学建筑工程学院,哈尔滨150086

出　　处：《低温建筑技术》2024年第7期84-88,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金项目(52078380)。

摘　　要：为研究干扰条件下串列方柱的风压特性及其流场机理,文中采用大涡模拟方法,探究不同宽度比施扰建筑的干扰下,受扰建筑周围流场和气动力的影响,并分析不同模型在雷诺数为22000,间距比为2.5时的气动力系数、平均风压系数以及流场分布特性。结果表明两方柱的平均阻力方向相反,脉动阻力系数呈现先减后增,再减再增的规律;迎风面和背风面均表现为风吸力,侧立面有部分区域表现为风压力,平均风压系数极值随着宽度比的增加而增大;随着宽度比的增加,上游方柱剪切层的宽度增大。在5种不同宽度比下的干扰效应研究中,得出的结论是当宽度比为1.4时,遮挡效应最为明显。This paper studies the wind pressure characteristics and flow field mechanism of tandem square columns due to flow interference,in which the flow field and aerodynamic forces on the principal building in different width ratios are studies by large eddy simulation method.The aerodynamic coefficients,average wind pressure coefficients,and flow field distribution characteristics of different models at a Reynolds number of 22000 and a spacing ratio of 2.5 are analyzed.The results indicate that the average drag directions of the two square cylinders are opposite,and the fluctuating drag coefficients show a pattern of first decreasing,then increasing,decreasing,and increasing again.Both the windward and leeward sides exhibit wind suction,while some areas on the lateral surface show wind pres⁃sure.The maximum value of the average wind pressure coefficient increases with the increase of the width ratio.The width of the shear layer of the upstream column gradually increases with the increase of width ratios.In the study of the interference effect under five different width ratios,the shielding effect is the most significant when the width ra⁃tio is 1.4.

关 键 词：方柱流场 大涡模拟 气场系数 平均风压系数 

分 类 号：TU972.1[建筑科学—建筑设计及理论]