Flow-induced vibrations of two tandem circular cylinders in a parallel-wall channel
Flow-induced vibrations of two tandem circular cylinders in a parallel-wall channel
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平行壁通道中两个串联圆柱体的流致振动
DOI：
10.1063/1.4898341
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发表时间：
2014-10
影响因子：
4.6
通讯作者：
Lin Jianzhong
中科院分区：
文献类型：
--
作者：
Jiang Renjie;Lin Jianzhong
本文用格子Boltzmann方法对平行壁通道中单柱和双柱串列圆柱绕流的流致振动进行了数值研究。在雷诺数Re = [1，160]的范围内，分别研究了两圆柱间流向分离S/D = [1.25，3]、质量比M = [0.05，5]和堵塞比β = [1/2，1/8]对圆柱运动和流体运动的影响。对于孤立圆柱，当质量比为1时，没有观察到大振幅的振动;当质量比为0.1时，随着雷诺数从1增加到160，圆柱运动从稳定状态逐渐转变为具有大振幅的偏置周期振动。对于两个圆柱串联的情况下，两个稳定的制度和各种不同的振荡制度与相应的流动结构进行了观察。在强耦合区，两个串联圆柱的临界质量比约为一个数量级。
Flow-induced vibrations of one and two tandem circular cylinders in the flow around cylinders in a parallel-wall channel are numerically studied by the lattice Boltzmann method. Within a range of Reynolds number Re = [1, 160], the effects of streamwise separation between two cylinders S/D = [1.25, 3], mass ratio M = [0.05, 5], and blockage ratio β = [1/2, 1/8] on the motions of cylinders and fluids are investigated, respectively. For the case of an isolated cylinder, as the mass ratio is 1, no large-amplitude oscillation is observed, and as the mass ratio is 0.1, the cylinder motion translates from the steady regime to the biased periodic vibration with a large oscillation amplitude gradually as Reynolds number is increased from 1 to 160. For the case of two cylinders in tandem, two steady regimes and a variety of distinct oscillation regimes with the corresponding flow structures are observed. The critical mass ratio of the two tandem cylinders in the strong coupling regime is about an order of magnitude...
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