1:4矩形断面の空力振動における渦に起因した干渉現象

松本 勝; 八木 知己; 玉置 斉; 坪田 樹; 李 再炯; 大窪 一正

doi:10.14887/kazekosymp.18.0.000031.0

PROCEEDINGS OF 18th NATIONAL SYMPOSIUM ON WIND ENGINEERING

DOI https://doi.org/10.14887/kazekosymp.18.0.000031.0

Conference information

Host: Science Council of Japan

Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japanese Society of Steel Construction, Japanese Society of Civil Engineering, Meteorological Society of Japan

THE VORTEX INTERFERENCE TO AERODYNAMIC INSTABILITY ON THE RECTANGULAR SECTION WITH SIDE RATIO OF 4

Masaru Matsumoto, Tomomi Yagi, Hitoshi Tamaki, *Tatsuki Tsubota, Jaehyung Lee, Kazumasa Okubo

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Keywords: Aerodynamic interference, Vortex, Rectangular section

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 000031

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Abstract

The vortex interference to aerodynamic instability on the rectangular section with side ratio of B/D =4 (B : width length, D : height length) was experimentally investigated. The rotation axes were varied and a splitter plate was installed in the wake to destroy the Karman vortices. Two types of the interference phenomena were confirmed. One is the interference between motion-induced excitation and Karman vortex, the other is between torsional flutter instability and Karman vortex. The lock-in phenomenon of Karman vortex shedding to the body motion affected the vortex shedding from the leading edge and the unsteady pressure characteristics at trailing edge.

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