Resonance in flow past oscillating cylinder under subcritical conditions
Resonance in flow past oscillating cylinder under subcritical conditions
复制标题
亚临界条件下流过振荡气缸的共振
DOI：
10.1007/s10483-017-2175-8
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发表时间：
2017-03
影响因子：
--
通讯作者：
Pengjun Zheng
中科院分区：
文献类型：
--
作者：
Renjie Jiang;Pengjun Zheng
采用格子Boltzmann方法（LBM）对亚临界区振荡圆柱绕流进行了数值研究。系统地研究了雷诺数、振幅和频率对圆柱表面涡尾迹模态和水动力的影响。特别注意的现象引起的共振缸振荡。结果表明，亚临界条件下，涡脱落现象得到广泛的激发，振动频率响应区域随雷诺数和振幅的增大而变宽。观察到两种不同类型的旋涡脱落制度。第一种类型的旋涡脱落状态（VSR I）在接近流动固有频率的低频下激发，第二种类型的旋涡脱落状态（VSR II）在雷诺数接近临界值的高频下发生。在VSR I中，每个振荡周期尾迹中会脱落一对交替旋转的涡，并发生锁定/同步;而在VSR II中，两个交替旋转的涡会脱落几个振荡周期，且在临界条件下，涡脱落频率接近静止圆柱的频率。分别分析了两种旋涡脱落模式的激发机理。
Flow around an oscillating cylinder in a subcritical region are numerically studied with a lattice Boltzmann method (LBM). The effects of the Reynolds number, oscillation amplitude and frequency on the vortex wake modes and hydrodynamics forces on the cylinder surface are systematically investigated. Special attention is paid to the phenomenon of resonance induced by the cylinder oscillation. The results demonstrate that vortex shedding can be excited extensively under subcritical conditions, and the response region of vibration frequency broadens with increasing Reynolds number and oscillation amplitude. Two distinct types of vortex shedding regimes are observed. The first type of vortex shedding regime (VSR I) is excited at low frequencies close to the intrinsic frequency of flow, and the second type of vortex shedding regime (VSR II) occurs at high frequencies with the Reynolds number close to the critical value. In the VSR I, a pair of alternately rotating vortices are shed in the wake per oscillation cycle, and lock-in/synchronization occurs, while in the VSR II, two alternately rotating vortices are shed for several oscillation cycles, and the vortex shedding frequency is close to that of a stationary cylinder under the critical condition. The excitation mechanisms of the two types of vortex shedding modes are analyzed separately.
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影响因子：
3.7
作者：
Dutsch, H;Durst, F;Lienhart, H
通讯作者：
Lienhart, H
平行壁通道中两个串联圆柱体的流致振动
影响因子：
4.6
作者：
Jiang Renjie;Lin Jianzhong
通讯作者：
Lin Jianzhong
影响因子：
8.6
作者：
P. Roushan;X. Wu
通讯作者：
P. Roushan;X. Wu
DOI：
10.1098/rspa.1964.0005
发表时间：
1964-01-01
影响因子：
--
作者：
BISHOP, RED;HASSAN, AY
通讯作者：
HASSAN, AY
影响因子：
8.6
作者：
OLINGER, DJ;SREENIVASAN, KR
通讯作者：
SREENIVASAN, KR