流力振動する角柱の三次元数値シミュレーション(流体工学, 流体機械)

概要

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It is important to predict flow-induced vibration of a bluff body elastically supported in a uniform flow. In this paper, the free oscillation of a rectangular cylinder with two-degree of freedom in the streamwise (in-line) and cross-flow (transverse) dircctions in a uniform flow, has been computced by the LES method at high Reynolds number of 2.2×10^4. The Smagorinsky model was used as a subgrid scale (SGS) model. The main objectives of this work are to predict and estimate characteristics of flows around a free-ocillating cylinder. The present computations successfully reproduce various types of flow-induced vibrations of a free-oscillating rectangular cylinder which were found by experiments; in-line oscillation, eddy-excitation and low-velocity galloping.
一般社団法人日本機械学会の論文
2002-06-25