线形布置双矩形柱的平均气动力特性试验研究  

Test study on average aerodynamic force characteristics of linearly arranged two rectangular cylinders

作　　者：姜会民 杨群 范佳豪[1] 刘小兵 JIANG Huimin;YANG Qun;FAN Jiahao;LIU Xiaobing(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Provincial Innovation Center for Wind Engineering and Wind Energy Technology,Shijiazhuang 050043,China;State Key Lab of Mechanical Behavior and System Safety of Transportation Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]河北省风工程和风能利用工程技术创新中心,石家庄050043 [3]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,石家庄050043

出　　处：《振动与冲击》2024年第5期20-30,81,共12页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(52008273,52078313);河北省自然科学基金项目(E2020210083);河北省研究生创新资助项目(CXZZBS2023133)。

摘　　要：为研究线形布置双矩形柱的平均气动力特性,采用刚性模型测压风洞试验测试并分析了宽高比为1∶4的双矩形柱在不同风向角和不同间距比下的平均阻力系数和平均升力系数,并与单矩形柱的试验结果进行了对比分析。在此基础上,通过分析平均风压分布进一步揭示了线形布置双矩形柱平均气动力系数的干扰机理。风向角α的变化范围为0°~90°,间距比P/B(双矩形柱的中心距与矩形柱宽度之比)的变化范围为1.2~8.0。研究结果表明:双矩形柱的平均阻力系数可分为0°≤α≤30°和30°<α≤90°两类;上游矩形柱的平均升力系数可分为0°≤α≤75°和75°<α≤90°两类;下游矩形柱的平均升力系数可分为0°≤α≤20°和20°<α≤90°两类。平均气动力系数的放大效应主要体现在上游矩形柱,平均阻力系数最大为单矩形柱的1.5倍,平均升力系数最大为单矩形柱的2.1倍。Here,to study average aerodynamic force characteristics of linearly arranged two rectangular cylinders,wind tunnel tests using a rigid model to measure pressure were conducted to test and analyze average drag coefficient and average lift coefficient of two rectangular cylinders with an aspect ratio of 1∶4 under different wind direction angles and spacing ratios.The results and those for single rectangular column were analyzed contrastively.Then,the interference mechanism of average aerodynamic force coefficient of linearly arranged two rectangular cylinders was further revealed by analyzing average wind pressure distribution.Wind direction angleα’s variation range was 0°-90°,and the variation range of spacing ratio P/B,i.e.,the ratio of center distance of two rectangular cylinders to rectangular column width,was 1.2-8.0.The study results showed that the average drag coefficient of two rectangular cylinders can be divided into 2 types of 0°≤α≤30°and 30°<α≤90°;the average lift coefficient of upstream rectangular column can be divided into 2 types of 0°≤α≤75°and 75°<α≤90°;the average lift coefficient of downstream rectangular column can be divided into 2 types of 0°≤α≤20°and 20°<α≤90°;the amplification effect of average aerodynamic force coefficient is mainly reflected on upstream column,it has the maximum average drag coefficient being 1.5 times that of a single rectangular column and the maximum average lift coefficient being 2.1 times that of a single rectangular column.

关 键 词：双矩形柱 线形布置 平均气动力系数 平均风压分布 风洞试验 风向角 间距比 

分 类 号：TU312.1[建筑科学—结构工程] TH137.1[机械工程—机械制造及自动化]