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

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (5) : 20-30.

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

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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.

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two rectangular cylinders / linear arrangement / mean aerodynamic force coefficients / mean wind pressure distribution / wind tunnel test / incidence angle / spacing ratio

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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

References

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