Lock-in behavior in simulated vortex-induced vibration

被引：85

作者：

Blackburn, HM ^{[1
]}

Henderson, RD ^{[1
]}

机构：

[1] CALTECH, GRAD AERONAUT LABS, PASADENA, CA 91125 USA

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 1996年 / 12卷 / 02期

关键词：

cylinder; vortex; vibration; lock-in; wake; chaos;

D O I：

10.1016/0894-1777(95)00093-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Results are presented for a two-dimensional numerical simulation of vortex-induced vibration of a circular cylinder at a Reynolds number of 250. A spectral element spatial discretization and a stiffly stable time integration scheme were employed to solve the Navier-Stokes equations in an accelerating frame of reference attached to the cylinder. The response envelope of the vibrating cylinder was similar to those previously obtained in experiments, and lock-in (coalescence of cross-flow oscillation and vortex-shedding frequencies at a frequency close to the cylinder natural frequency) was observed. Chaotic cylinder responses were observed over a range of cylinder natural frequencies. Simulations of flows past a cylinder in forced cross-flow oscillation are also discussed, and a result showing an asymmetric P + S vortex shedding mode is presented.

引用

页码：184 / 189

页数：6

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