1998 Volume 63 Issue 504 Pages 15-21
The unsteady three-dimensional flows around an oscillating rectangular cylinder are numerically simulated by means of the direct finite difference method without any turbulence model. We deal with a rectangular cylinder with D/B=2 as a computational model, which is elastically mounted in heaving mode in uniform flows. The effects of various dynamic parameters such as mass ratio, damping factor or the Scruton number, on aeroelastic instabilities of vortex-induced oscillations and gallopings are individually investigated. It is obtained that the frequency of galloping oscillation is shifted in low mass ratio, as a result the response becomes larger.
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