Mean aerodynamic force characteristics of three circular cylinders arranged inline at a subcritical Reynolds number

被引：0
|
作者：
Liu X. [1 ,2 ,3 ]
Jiang H. [3 ]
Wang S. [3 ]
Liu X. [1 ,2 ,3 ]
Yang Q. [1 ,2 ,3 ]
机构：
[1] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang
[2] Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang
[3] School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷 / 03期
关键词：
incidence angle; mean aerodynamic force coefficient; mean wind pressure coefficient; spacing ratio; three circular cylinders arranged inline; wind tunnel test;
D O I：
10.14006/j.jzjgxb.2021.0703
中图分类号：
学科分类号：
摘要：
To provide a reference value of the mean wind load for the three-cylinder structure arranged inline, the mean aerodynamic force characteristics of three circular cylinders arranged inline at different incidence angles and spacing ratios were studied via pressure-measured rigid model wind tunnel tests. The results were compared with those of a single cylinder. The Reynolds number is 6.4 × 104, and the range of incidence angle α and spacing ratio L/D (the ratio of the center distance between adjacent cylinders to the diameter of the cylinder) are 0°-90° and 1.2-4.0, respectively. The results show that according to the spacing ratios, the mean aerodynamic force characteristics of three circular cylinders arranged inline can be roughly divided into four types: minimum spacing ratio (1.2≤L/D < 1.4), small spacing ratio (1.4≤L/D < 2.5), medium spacing ratio (2.5≤L/D < 3.5), and large spacing ratio (3.5≤ L/D≤4.0). At the minimum and small spacing ratios, the mean drag coefficient of three cylinders mainly experiences a decreasing effect. At the medium spacing ratio, the mean drag coefficient shows a decreasing effect when α < 60° and an increasing effect when α≥60°. At the large spacing ratio, the mean drag coefficient for the two downstream cylinders experiences a decreasing effect when α≤30°. The mean lift coefficient of the three cylinders shows non-zero values in a certain range of incidence angles, which is closely related to the spacing ratio. © 2023 Science Press. All rights reserved.
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页码：185 / 197
页数：12
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