Poiseuille flow-induced vibrations of two tandem circular cylinders with different mass ratios
Poiseuille flow-induced vibrations of two tandem circular cylinders with different mass ratios
复制标题
不同质量比的两个串联圆柱体的泊肃叶流激振动
DOI：
10.1063/1.4954501
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发表时间：
2016-06
影响因子：
4.6
通讯作者：
Jianzhong Lin
中科院分区：
文献类型：
--
作者：
Renjie Jiang;Jianzhong Lin
采用晶格玻尔兹曼方法，对两个质量比不同的串联圆柱体的流激振动进行了数值研究。在雷诺数Re = 100、堵塞比β = 1/4的条件下，研究了质量比m * =[0.0625,16]和两柱间顺流距离S/D =[1.125,10]对圆柱运动和涡尾模式的影响。观察到各种不同的圆柱运动状态，包括对称周期振动、偏置准周期振动、跳动振动和稳定状态，以及相应的尾迹结构，如两排交替旋转涡、单排同号涡和稳定尾迹。对于每个当前情况，气缸运动类型是排他性的，并且在二元振荡状态下，两个气缸总是以共同的主频率振动。通常，较轻的气缸振荡幅度大于较重的气缸，而较重的气缸承受的升力大于较轻的气缸。升力和缸体位移始终表现为非相态。在间隙干涉区，可以广泛地产生大振幅振荡，在尾流干涉区，柱体运动和流体流动主要依赖于上游柱体。当分离足够大时，两个圆柱体表现为两个孤立的圆柱体。本文还分析了圆柱振动的激发机理。
Flow-induced vibrations of two tandem circular cylinders with different mass ratios confined between two parallel walls are numerically studied via a lattice Boltzmann method. With fixed Reynolds number Re = 100 and blockage ratio β = 1/4, the effects of mass ratio m ∗ = [0.0625,16] and streamwise separation between two cylinders S/D = [1.125,10] on the cylinder motions and vortex wake modes are investigated. A variety of distinct cylinder motion regimes involving the symmetric periodic vibration, biased quasi-periodic vibration, beating vibration, and steady regimes, with the corresponding wake structures, e.g., two rows of alternately rotating vortices, a single row of same-sign vortices, and steady wake, are observed. For each current case, the cylinder motion type is exclusive and in the binary oscillation regime, both cylinders always vibrate at a common primary frequency. The lighter cylinder usually oscillates at a larger amplitude than the heavier one, while the heavier cylinder undergoes larger lift force than the lighter one. The lift force and cylinder displacement always behave as an out-of-phase state. In the gap-interference region, large-amplitude oscillations could be produced extensively and in the wakeinterference region, the cylinder motions and fluid flows are mainly dependent on the upstream cylinder. When the separation is large enough, both cylinders behave as two isolated ones. The mechanisms for the excitations of cylinder vibrations have also been analysed.
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影响因子：
3.6
作者：
D. Tham;P. S. Gurugubelli;Zhong Li;R. Jaiman
通讯作者：
D. Tham;P. S. Gurugubelli;Zhong Li;R. Jaiman
影响因子：
4.6
作者：
B. Celik;A. Beskok
通讯作者：
B. Celik;A. Beskok
DOI：
10.1016/j.ijheatmasstransfer.2009.10.034
发表时间：
2010-01
影响因子：
5.2
作者：
B. Celik;M. Raisee;A. Beskok
通讯作者：
B. Celik;M. Raisee;A. Beskok
影响因子：
3.7
作者：
L. Zovatto;G. Pedrizzetti
通讯作者：
L. Zovatto;G. Pedrizzetti
DOI：
10.4043/3991-ms
发表时间：
1981
期刊：
--
影响因子：
--
作者：
D. Tsahalis;W. Jones
通讯作者：
D. Tsahalis;W. Jones