Study for the cross-flow coupling mechanism of tandem cylinder groups at low Reynolds number | |
Tu, Jiahuang1; He, Zhancheng1; Tan, Xiaoling2; Wang, Guanyu1; Xu, Jixiang3; Xu, Yuwang4 | |
2022-09-15 | |
发表期刊 | Ocean Engineering |
ISSN | 0029-8018 |
卷号 | 260 |
摘要 | A numerical analysis of flow-induced vibrations for tandem cylinder groups which include two and three tandem cylinders with a spacing ratio of L/D = 5.5 (where L is the distance between the circular cylinders and D is the circular diameter) in planar shear flow is carried out. The cylinders can only vibrate freely in the cross-flow direction. A finite element method called four-step semi-implicit characteristic-based split (4-SICBS) is used to solve the Navier-Stokes equation. On the other hand, in order to maximize the oscillation response of the dynamic system, the damping ratio of it is ξ = 0. And the mass ratio of structure is set to mr = 2.0. The four main parameters, such as the number of cylinders (Num = 2, 3), Reynolds number (Re = 100, 160), the shear ratio (k = 0.0, 0.05, 0.1) as well as the reduced velocity (Ur = 3–30) are mainly studied the dynamic behaviors, frequency and spectrum characteristics, phase characteristics as well as energy characteristics of tandem cylinder groups. The results show that vibration responses of the upstream cylinders in tandem cylinder groups are similar to that of a single cylinder, while the parameters play a key role in flow-induced vibrations of the midstream and downstream cylinders. As Re = 100, the downstream cylinder of two tandem cylinders and the midstream cylinder of three tandem cylinders are in the state of increasing and then decreasing, and the downstream cylinder of three tandem cylinders has a larger vibration response with the change of k. As k = 0.1, the amplitude drops to zero with the increase of Ur. In addition, the situation becomes more complicated with the increase of Re. For the downstream cylinder of three tandem cylinders at Re = 160, there are two peaks of the cross-flow amplitude. The oscillation remains strong at larger Ur for the case of k = 0.1. Finally, the interactions between cylinders are revealed, together with the vortex dynamic mechanism underlying the oscillation characteristics of tandem cylinders exposed to planar shear flow. © 2022 Elsevier Ltd |
关键词 | Circular cylinders Navier Stokes equations Oscillating cylinders Oscillating flow Reynolds number Shear flow Vibration analysis Vortex flow Cross flows Cylinder groups Downstream cylinders Dynamic mechanism Planar shear flow Tandem cylinder Tandem cylinder group Vibration response Vortex dynamic mechanism Vortex dynamics |
DOI | 10.1016/j.oceaneng.2022.112004 |
收录类别 | EI ; SCIE |
语种 | 英语 |
WOS研究方向 | Engineering ; Oceanography |
WOS类目 | Engineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography |
WOS记录号 | WOS:000863042300004 |
出版者 | Elsevier Ltd |
EI入藏号 | 20223012405346 |
EI主题词 | Finite element method |
EI分类号 | 601.1 Mechanical Devices - 631.1 Fluid Flow, General - 921.2 Calculus - 921.6 Numerical Methods |
来源库 | WOS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/159394 |
专题 | 土木工程学院 |
通讯作者 | Xu, Yuwang |
作者单位 | 1.Xiangtan Univ, Coll Civil Engn, Xiangtan 411105, Hunan, Peoples R China; 2.Zhongye Changtian Int Engn Co Ltd, Changsha 410015, Peoples R China; 3.Lanzhou Univ Technol, Dept Civil Engn, Lanzhou 730050, Peoples R China; 4.Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China |
第一作者单位 | 土木工程学院 |
第一作者的第一单位 | 土木工程学院 |
推荐引用方式 GB/T 7714 | Tu, Jiahuang,He, Zhancheng,Tan, Xiaoling,et al. Study for the cross-flow coupling mechanism of tandem cylinder groups at low Reynolds number[J]. Ocean Engineering,2022,260. |
APA | Tu, Jiahuang,He, Zhancheng,Tan, Xiaoling,Wang, Guanyu,Xu, Jixiang,&Xu, Yuwang.(2022).Study for the cross-flow coupling mechanism of tandem cylinder groups at low Reynolds number.Ocean Engineering,260. |
MLA | Tu, Jiahuang,et al."Study for the cross-flow coupling mechanism of tandem cylinder groups at low Reynolds number".Ocean Engineering 260(2022). |
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