Flow over an inline oscillating circular cylinder in the wake of a stationary circular cylinder
Flow over an inline oscillating circular cylinder in the wake of a stationary circular cylinder
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流动在静止圆柱体之后的直列振荡圆柱体上
DOI：
10.1088/0169-5983/49/1/015504
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发表时间：
2017-02
影响因子：
1.5
通讯作者：
Keqiang Zhu
中科院分区：
文献类型：
--
作者：
Yang Zhang;Keqiang Zhu
用晶格玻尔兹曼方法研究了上游固定圆柱体与直线振荡圆柱体之间的流动干涉。在雷诺数Re = 100、螺距比L/D = 4的条件下，研究了振幅a /D =[0.25, 1]、频率f /f =[0.5, 2]对振动的影响。尾迹响应状态分为锁定状态和非锁定状态。幅频分岔图中的锁定区是不连续的。在小幅度或低频条件下，上下游尾迹的响应状态相似。然而，当振荡参数较大时，随着流场的不规则化，两个尾迹容易处于不同的状态。已经确定了两种不同的流动形式，即单缸和双缸脱落形式。单缸脱落的存在是由于下游缸在大振幅下的低脱落频率造成的。讨论了振荡串联系统的水动力。结果表明，作用在两个气缸上的力表现不同，间隙流中没有涡流显著降低了作用在串联系统上的力。
Flow interference between an upstream stationary cylinder and an inline oscillating cylinder is studied with the lattice Boltzmann method. With a fixed Reynolds number Re = 100 and pitch ratio L/D = 4, the effects of oscillation amplitude A/D = [0.25, 1] and frequency f e/f s = [0.5, 2] are investigated. The wake response state is categorized into lock-in and non-lock-in. The lock-in zone in the bifurcation diagram of amplitude versus frequency is discontinuous. Response states of upstream and downstream wakes are similar under the conditions of small amplitude or low frequency. However, with large oscillating parameters, the two wakes are prone to be in different states as the flow field becomes irregular. Two distinct flow regimes have been identified, i.e., single-cylinder and two-cylinder shedding regimes. The presence of single-cylinder shedding regime is attributed to the low shedding frequency of the downstream cylinder at large amplitude. Hydrodynamic forces of the oscillating tandem system are discussed. The results reveal that forces on the two cylinders behave differently and that the absence of vortices in the gap flow significantly reduces the forces exerting on the tandem system.
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影响因子：
3.7
作者：
O. Çetiner;D. Rockwell
通讯作者：
O. Çetiner;D. Rockwell
影响因子：
4.6
作者：
E. Konstantinidis;C. Liang
通讯作者：
E. Konstantinidis;C. Liang
影响因子：
2
作者：
O. Griffin;M. Hall
通讯作者：
O. Griffin;M. Hall
DOI：
--
发表时间：
2002
期刊：
--
影响因子：
--
作者：
Sj Xu;Y. Zhou
通讯作者：
Sj Xu;Y. Zhou
影响因子：
3.7
作者：
Georgios V. Papaioannou;D. Yue;M. Triantafyllou;G. Karniadakis
通讯作者：
Georgios V. Papaioannou;D. Yue;M. Triantafyllou;G. Karniadakis