621 有限長円柱の流れ方向振動のメカニズム

概要

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The flow-induced in-line oscillation of a cantilevered circular cylinder was experimentally studied by free oscillation tests in a water tunnel. Two hot-film probes were set near the test cylinder to measure the fluctuating velocity in the near-wake. These probes were moved along span direction at some reduced velocities. Two types of test cylinders, aspect ration 10 (AR10) and aspect ratio 21 with the end plate (AR21), were investigated. The vortex structure of the AR21 cylinder with the end plate varied according to the reduced velocity. But the vortex structure of the AR10 cylinder is mainly symmetrical vortex at any reduced velocity. The difference between these vortex structures is related to the characteristics of vibration, i.e. the AR21 cylinder has two excitation regions but the RA10 cylinder has on region.
一般社団法人日本機械学会の論文
2003-09-15