Suppression mechanism of aerodynamic vibration due to Separation Interference Method for various rectangular prisms

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  • HAYASHIDA Koji
    Disaster Prevention and Wind Engineering Group, Kajima Technical Research Institute
  • KUBO Yoshinobu
    Department of Civil Engineering, Kyushu Institute of Technology
  • OKUBO Kazumasa
    Disaster Prevention and Wind Engineering Group, Kajima Technical Research Institute
  • IKEDA Hayato
    Department of Civil Engineering, Kyushu Institute of Technology

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Other Title
  • 各種矩形断面柱を対象とした剥離干渉法による空力弾性振動の制振メカニズム
  • カクシュ クケイ ダンメンチュウ オ タイショウ ト シタ ハクリ カンショウホウ ニ ヨル クウリキ ダンセイ シンドウ ノ セイシン メカニズム

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Abstract

The authors developed one method and tried to make clear its suppression mechanism. By using a plate that is placed to normal to the surface of the body at an optimum position, the separation flow from the leading edge is forced to touch the tip of the plate. The method was named by one of authors, as Separation Interference Method (SIM). The detail of this method and the suppression mechanism on the aerodynamic vibrations are described in the present paper. As a result, it is shown that circulatory flow between 1st separation point and 2nd separation point is very important for SIM. In the present paper, it is concluded that the mechanism of SIM possesses the same effect on both the square prism and the rectangular prism with re-attachment of separation flow. Furthermore, it is made clear that SIM is also effective in turbulent flow as well as in smooth flow.

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