Fluctuating aerodynamic force characteristics of two square cylinders arranged inline under different wind direction angles
YANG Qun1，2，3, WU Qianyun3, JIANG Huimin3, LIU Qingkuan1，2，3, LIU Xiaobing1，2，3
1. State Key Lab of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2. Hebei Provincial Innovation Center for Wind Engineering and Wind Energy Technology, Shijiazhuang 050043, China;
3. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Abstract：In order to provide a reference for fluctuating wind load of two structures with square cross-section arranged inline in practical engineering, fluctuating aerodynamic force coefficients of two square cylinders arranged inline under different wind direction angles and spacing ratios were measured with rigid model wind tunnel tests. The results were analyzed and compared with those of single square cylinder. The results showed that according to wind direction angles, fluctuating aerodynamic force characteristics of two square cylinders arranged inline can be divided into three types of small wind direction angle（0°≤α≤10°）, medium wind direction angle（10°＜α＜80°）and large wind direction angle （80°≤α≤90°）; under small wind direction angle and large one, fluctuating aerodynamic force coefficient rises abruptly within the ranges of 3.0＜L/D＜4.0 and 2.0＜L/D＜3.0; under medium wind direction angle, fluctuating aerodynamic force coefficient does not change abruptly with variation of spacing ratio L/D; according to wind direction angles, the type of medium wind direction angle can also be divided into two sub-types of 10°＜α≤30° and 30°＜α＜80°.
杨群1,2,3，吴倩云3，姜会民3，刘庆宽1,2,3，刘小兵1,2,3. 不同风向角下线形布置双方柱脉动气动力特性研究[J]. 振动与冲击, 2021, 40(13): 159-166.
YANG Qun1，2，3, WU Qianyun3, JIANG Huimin3, LIU Qingkuan1，2，3, LIU Xiaobing1，2，3. Fluctuating aerodynamic force characteristics of two square cylinders arranged inline under different wind direction angles. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(13): 159-166.
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