Experimental research on vortex-induced vibration interference effect of two circular cylinders based on Canny algorithm

被引：0
|
作者：
Chen W. [1 ]
Wang H. [1 ,2 ]
Dong Y. [1 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] National Engineering Research Center of High-speed Railway Construction Technology, Central South University, Changsha
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Canny algorithm; interference factors; two circular cylinders; vortex-induced vibration; wind tunnel test;
D O I：
10.11817/j.issn.1672-7207.2023.07.025
中图分类号：
学科分类号：
摘要：
Based on the Canny algorithm to edge detection and with the aid of flow visualization method, the vortex-induced vibration interference effect of two circular cylinders with large slenderness ratio was studied. The results show that when the double cylinders are arranged in tandem, by interfering with the formation of the vortex of upstream cylinder and the motion of its wake, the downstream cylinder has the greatest amplifying effect on the maximum amplitude A*max of upstream cylinder in the dimensionless downstream streamwise direction position X*= 1.5, and has no interference effect on the A*max of upstream cylinder at X*≥15.0, but the exit wind speed of vortex-induced vibration of upstream cylinder is slightly larger than that of the single cylinder. The upstream cylinder changes the incoming flow conditions of the downstream cylinder, when the downstream cylinder is when X*=2.0, the upstream cylinder has the largest amplification effect on its A*max, and the amplification effect still exists when X*=20.0. When the double cylinders are arranged side by side, the amplifying effect on the A*max is the greatest at dimensionless transverse spacing Y*=1.0, and the double cylinders can be regarded as a combined single cylinder and vibrate together with a large amplitude. The interference effect on the A*max is little when Y*=4.0, but the locking range of vortex-induced vibration of double cylinders is still slightly larger than that of the single cylinder. When the double cylinders are arranged in staggered, the A*max of upstream cylinder is obviously suppressed by the downstream cylinder located when 1<X*<8 and 1<Y*<5; and in comparison, the interference effect of the upstream cylinder on the A*max of downstream cylinder is weaker, showing a greatest amplifying effect when the downstream cylinder is near the (0, 1D) position. © 2023 Central South University of Technology. All rights reserved.
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页码：2799 / 2810
页数：11
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