串列三圆柱的脉动气动力特性试验研究

刘小兵1,2,3,姜会民3,王世博3,杨群1,2,3

振动与冲击 ›› 2021, Vol. 40 ›› Issue (13) : 96-103.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (13) : 96-103.
论文

串列三圆柱的脉动气动力特性试验研究

  • 刘小兵1,2,3,姜会民3,王世博3,杨群1,2,3
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Tests for fluctuating aerodynamic force characteristics of three cylinders in series

  • LIU Xiaobing1,2,3, JIANG Huimin3, WANG Shibo3, YANG Qun1,2,3
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摘要

采用刚性模型测压风洞试验的方法研究了不同间距下串列三圆柱的脉动气动力特性,并与单圆柱和串列双圆柱的结果进行了对比。试验雷诺数以及间距比
L/D(相邻圆柱中心距与单圆柱的直径之比)分别为3.4×104和1.2~12.0。研究结果发现,与串列双圆柱类似,串列三圆柱上游和中游圆柱的临界间距比(L/D)cr=3.5~4.0。在临界间距比附近,脉动气动力系数突升至最大值。串列三圆柱下游圆柱表现出两个临界间距比,分别为(L/D)cr1=2.0~2.5和(L/D)cr2=3.5~4.0。脉动气动力系数在临界间距比(L/D)cr1附近突升至最大值,而在临界间距比(L/D)cr2附近发生突降现象。气动干扰对串列三圆柱斯托罗哈数的影响表现为减小效应,与串列双圆柱相比,这种减小效应在L/D<(L/D)cr时更明显。

Abstract

Here, fluctuating aerodynamic force characteristics of three cylinders in series with different spacings were studied by using the method of rigid model pressure measurement wind tunnel tests, and the results were compared with those of single cylinder and double-cylinder in series. The test Reynolds number and spacing ratio L/D, i.e., the ratio of center distance between adjacent cylinders to diameter of single cylinder, were 3.4×104 and 1.2-12.0, respectively. The results showed that for three cylinders in series, critical spacing ratio (L/D)cr of its upstream cylinder and that of midstream cylinder are 3.5-4.0, similar to those for double-cylinder in series; near the critical spacing ratio, fluctuating aerodynamic force coefficient suddenly rises to the maximum value; there are two critical spacing ratios for the downstream cylinder of three cylinders in series, they are (L/D)cr1= 2.0-2.5 and (L/D)cr2=3.5-4.0; fluctuating aerodynamic force coefficient suddenly rises to the maximum value near the critical spacing ratio (L/D)cr1, but drops sharply near the critical spacing ratio (L/D)cr2; the influence of aerodynamic interference on Strouhal number of three cylinders in series is presented as a reducing effect, it is more obvious when L/D<(L/D)cr compared with two-cylinder in series.

关键词

串列三圆柱 / 风洞试验 / 脉动压力分布 / 脉动气动力 / 斯托罗哈数

Key words

three cylinders in series / wind tunnel test / fluctuating pressure distribution / fluctuating aerodynamic force / Strouhal number

引用本文

导出引用
刘小兵1,2,3,姜会民3,王世博3,杨群1,2,3. 串列三圆柱的脉动气动力特性试验研究[J]. 振动与冲击, 2021, 40(13): 96-103
LIU Xiaobing1,2,3, JIANG Huimin3, WANG Shibo3, YANG Qun1,2,3. Tests for fluctuating aerodynamic force characteristics of three cylinders in series[J]. Journal of Vibration and Shock, 2021, 40(13): 96-103

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