波浪形圆柱的气动力特性试验研究

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斜拉索的风荷载和风致振动问题突出，探索能够减阻抑振的新型斜拉索意义重大。研究表明，波浪形圆柱在Re=103~104有减阻抑振效果，而真实斜拉索的雷诺数通常在105量级，有必要研究波浪形圆柱在高雷诺数下的气动性能。以特定几何参数的波浪形圆柱为研究对象，通过风洞试验方法，研究了波浪形圆柱在Re=1.4×105~4.0×105的气动力变化规律。研究结果表明：与等截面圆柱相比，波浪形圆柱的整体阻力系数更大，当Re=1.4×105~3.6×105约大4%~8%，当Re=3.6×105~4.0×105约大47%；在临界区，波浪形圆柱的阻力系数没有出现从预临界区(TrBL0)至单分离泡区(TrBL1)转变过程中的阻力大幅下降的现象，而是随着雷诺数的增大，呈稳定不变的趋势；整体升力系数在整个试验雷诺数范围内始终约为0；展向不同位置的阻力系数、升力系数和风压分布随雷诺数的变化规律表现出差异性，这主要是由于波浪形圆柱的三维几何特性导致的。

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	安苗1
	刘庆宽2
	3
	孙一飞1
	郑云飞4
	贾娅娅2
	3

关键词 ：波浪形圆柱, 等截面圆柱, 减阻抑振, 气动力, 风洞试验, 雷诺数效应

Abstract：The wind load and wind-induced vibration of stay cables are prominent. It is of great significance to explore a new type of stay cable which can not only reduce drag force but also suppress vibration. It is reported that a wavy cylinder has the capability of reducing drag force and suppressing vibration at Reynolds number of 103-104. In fact, the Reynolds number of stay cables is actually 105. It is necessary to examine the aerodynamic performance of a wavy cylinder at high Reynolds number. Taking a wavy cylinder with specific geometric parameters as the research object, the aerodynamic characteristics during Reynolds number of 1.4 ×105-4.0×105 were studied through a wind tunnel test. The results show that the drag force coefficient of the wavy cylinder is larger than that of a uniform cross section cylinder. During the Reynolds number of 1.4×105-3.6×105, value is around 4%-8%. The value is up to 47% in 3.6×105-4.0×105. In critical Reynolds number region, the drag force coefficient of the wavy cylinder does not experience sharply declining which belongs to the transition from pre-critical regime (TrBL0) to one bubble regime (TrBL1). However, the drag force coefficient maintains stable with the increasing of Reynolds number. And the lift coefficient is always near 0 during whole tested Reynolds number. The variation of drag force coefficient, lift force coefficient, and wind pressure distribution with Reynolds number at different spanwise locations behave differently, which is mainly due to 3D geometric characteristics of the wavy cylinder.

Key words： wavy cylinder uniform cross section circular cylinder drag force reduction and vibration suppression aerodynamic force wind tunnel test Reynolds number effect

收稿日期: 2019-11-11 出版日期: 2021-04-28

引用本文:

安苗1，刘庆宽2, 3，孙一飞1，郑云飞4，贾娅娅2, 3. 波浪形圆柱的气动力特性试验研究[J]. 振动与冲击, 2021, 40(8): 209-215.
AN Miao1, LIU Qingkuan2,3, SUN Yifei1, ZHENG Yunfei4, JIA Yaya2, 3. Experimental study on aerodynamic characteristics of a wavy cylinder. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(8): 209-215.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I8/209

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