线形布置双矩形柱的平均气动力特性试验研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (5) : 20-30.

论文

姜会民1，杨群1,2,3，范佳豪1，刘小兵1,2,3

作者信息 +

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

JIANG Huimin1,YANG Qun1,2,3,FAN Jiahao1,LIU Xiaobing1,2,3

Author information +

文章历史 +

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。

Abstract

To investigate the mean aerodynamic force characteristics of two rectangular cylinders arranged inline, the mean drag coefficients and the mean lift coefficients of the two rectangular cylinders with a width-to-height ratio of 1:4 were tested and analyzed by rigid model pressure measurement wind tunnel tests at various incidence angles and different spacing ratios. The test results were compared with those of a single one. In addition, the interference mechanism of the mean aerodynamic force coefficients of the two rectangular cylinders arranged inline was further revealed by analyzing the mean wind pressure distribution. The incidence angle α varies from 0° to 90° and the spacing ratio P/B (the ratio of the center-to-center distance of the two rectangular cylinders to the breadth of the cylinders) ranges from 1.2 to 8.0. The results show that the mean drag coefficients of the two rectangular cylinders can be divided into two categories: 0°≤α≤30° and 30°<α≤90°. The mean lift coefficients of the upstream rectangular cylinder can be classified into 0°≤α≤75° and 75°<α≤90°, and that of the downstream rectangular cylinder can be diversified into 0°≤α≤20° and 20°<α≤90°. The amplifying effect of the mean aerodynamic force coefficients is mainly reflected in the upstream rectangular cylinder, where the maximum mean drag coefficient is 1.5 times that of a single rectangular cylinder and the maximum mean lift coefficient is 2.1 times that of a single one.

导出引用

姜会民1，杨群1,2,3，范佳豪1，刘小兵1,2,3. 线形布置双矩形柱的平均气动力特性试验研究[J]. 振动与冲击, 2024, 43(5): 20-30

JIANG Huimin1,YANG Qun1,2,3,FAN Jiahao1,LIU Xiaobing1,2,3. Test study on average aerodynamic force characteristics of linearly arranged two rectangular cylinders[J]. Journal of Vibration and Shock, 2024, 43(5): 20-30

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