Numerical Study of the Effect of Periodic Velocity Excitation on Aerodynamic Characteristics of an Oscillating Circular Cylinder
Numerical Study of the Effect of Periodic Velocity Excitation on Aerodynamic Characteristics of an Oscillating Circular Cylinder
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周期速度激励对振荡圆柱体气动特性影响的数值研究
DOI：
10.1080/10618569908940831
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
T. Nomura
中科院分区：
文献类型：
--
作者：
S. Hiejima;T. Nomura
采用基于 ALE 公式的有限元方法来研究周期性速度激励对振荡圆柱体气动特性的影响。周期性激励放置在圆柱体表面，激励圆柱体周围分离的剪切层，数值结果表明，一定的激励可以减少由非定常升力引起的负阻尼，从而稳定圆柱体的空气动力学。此外，由周期性激励引起的升力相位的变化对于稳定气缸的空气动力学似乎很重要。仿真还证实，周期性激励可以抑制气缸的涡激振动。
A finite element method based on ALE formulation has been adopted in order to examine the effect of periodic velocity excitation on the aerodynamic characteristics of an oscillating circular cylinder. Periodic excitation, which was placed on the cylinder surface, stimulated the separated shear layers around the cylinder, and numerical results showed that some excitation can reduce negative damping, which is caused by unsteady lift force, and thereby stabilize the aerodynamics of the cylinder. Furthermore, the change of lift phase caused by periodic excitation seems to be important in stabilizing the aerodynamics of the cylinder. The simulation also confirmed that periodic excitation can suppress the vortex-induced vibration of the cylinder.