Study on Influence of Tube Arrays on Fluid Elastic Instability

• ISHIHARA Kunihiko

  Institute of Technology and Science, The University of Tokushima

• KITAYAMA Gen

  Institute of Technology and Science, The University of Tokushima

抄録

The tube bank is used in boilers, heat exchangers in power plants and steam generators in nuclear plants. These tubes sometimes vibrate violently and come to the fatigue failure due to the flow induced vibration which is caused by the cross flow. This phenomenon is that the large vibrations arise at the critical flow velocity and it is called fluid elastic instability. However the relation between the onset velocity of fluid elastic instability and the tube array's geometry has not been clarified sufficiently. There is a few reference related to the relation between the pitch to diameter ratio and the onset velocity even in the lattice arrays. In this paper, the influence of tube arrays on fluid elastic instability is examined by experiments. As a result, it is clarified that the tube vibrations become large as T/D increases and L/D decreases, and the tube vibrations strongly depend on the dynamic characteristics of tubes such as the natural frequency and the damping ability.

収録刊行物

• Journal of System Design and Dynamics

  Journal of System Design and Dynamics 3 (5), 853-865, 2009

  一般社団法人 日本機械学会

キーワード

• Vibration Coupled with Fluid Motion
• Self-Excited Vibration
• Vortex
• Stability
• Heat Exchanger
• Boiler

詳細情報

• CRID: 1390001205271249536
• NII論文ID: 130000132933
• DOI: 10.1299/jsdd.3.853
• ISSN: 18813046
• Web Site: http://www.jstage.jst.go.jp/article/jsdd/3/5/3_5_853/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可