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ISSN: 2475-4811 (print)
ISSN: 2475-482X (online)
Journal of Vibration Testing and System Dynamics

C. Steve Suh (editor), Pawel Olejnik (editor),

Xianguo Tuo (editor)

Pawel Olejnik (editor)

Lodz University of Technology, Poland

Email: pawel.olejnik@p.lodz.pl

C. Steve Suh (editor)

Texas A&M University, USA

Email: ssuh@tamu.edu

Xiangguo Tuo (editor)

Sichuan University of Science and Engineering, China

Email: tuoxianguo@suse.edu.cn

Flow-induced Vibrations of two Staggered Circular Cylinders at Low Reynolds Number

Journal of Vcibration Testing and System Dynamics 3(1) (2019) 39--54 | DOI:10.5890/JVTSD.2019.03.004

Zehua Ye$^{1}$, Xu Sun$^{1}$, Jiazhong Zhang$^{2}$

$^{1}$ National Engineering Laboratory for Pipeline Safety, China University of Petroleum-Beijing, 102249, China

$^{2}$ School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

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Abstract

The effect of flow interference on the flow-induced vibrations (FIVs) of two staggered circular cylinders at low Reynolds numbers is investigated using fluid-structure interaction (FSI) simulations. The FIV mechanical model of the two staggered circular cylinders in a laminar flow is proposed and the corresponding non-dimensional governing equations are presented. An FSI solution procedure is subsequently developed by combining the modified characteristic-based split (CBS) finite element method, dual-time stepping method, segment spring analogy technique, generalized-α method and loosely-coupled partitioned method. The stability and accuracy of the procedures are validated using a benchmark FSI problem concerning the FIVs of a single circular cylinder in a laminar flow. Finally, using the numerical method proposed, the FIVs of two staggered circular cylinders at Re = 200, T/D (space ratio) = 5∼7 and α (inclined angle of the line connecting the two cylinders centers) = 0°∼ 90° are computed, and the effects of T/D and α on the vortex structure, fluid load and FIVs are discussed in detail.

Acknowledgments

This work is supported by the National Natural Science Foundation of China (No. 51506224) and Science Foundation of China University of Petroleum-Beijing (No. C201602). The authors gratefully acknowledge the support of the two agencies.

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