前縁はく離渦形矩形柱の流力振動抑制に関する研究

概要

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The objective of the present study is to investigate the suppression of the flow-induced vibration of a rectangular prism with impinging leading-edge vortices. The rectangular prism having width-to-height B/H of 3 in which vortices are formed at the leading edge is adopted. The vibration characteristics of the rectangular prism are investigated on the free and forced vibration test. The suppression of the flow-induced vibrations is established by a T-shape plate attached to the upstream and a splitter plate attached to the downstream of rectangular prism. Important results from the present study are that (i) there exists three types of flow-induced vibration, i. e. low-speed flutter, vortex excitation and high-speed flutter, (ii) the flow-induced vibration of the rectangular prism are strongly dependent on the impinging leading-edge vortices rather than the wake vortices, (iii) the suppression of the flow-induced vibrations of the rectangular prism is done with the most effectiveness when the impinging leading-edge vortices are suppressed with the T-shape plate attached to upstream of it.
一般社団法人日本機械学会の論文
2000-09-25