Fluctuating aerodynamic force characteristics of two square cylinders arranged inline under different wind direction angles

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (13) : 159-166.

YANG Qun1，2，3, WU Qianyun3, JIANG Huimin3, LIU Qingkuan1，2，3, LIU Xiaobing1，2，3

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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°.

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two square cylinders arranged inline / wind tunnel test / fluctuating aerodynamic force / wind direction angle

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YANG Qun1，2，3, WU Qianyun3, JIANG Huimin3, LIU Qingkuan1，2，3, LIU Xiaobing1，2，3. Fluctuating aerodynamic force characteristics of two square cylinders arranged inline under different wind direction angles[J]. Journal of Vibration and Shock, 2021, 40(13): 159-166

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