バネで支持された球の一様流中での振動 Oscillation of a Spring-Supported Sphere in Uniform Flow

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The dynamic instability of an elastic supported sphere in the uniform flow is studied experimentally by using the low speed open wind tunnel. If the oscillation was made by an initial deformation due to the outer disturbance, the oscillation was damped when the wind speed was below the some critical wind speed. However, if the wind speed increased over that critical wind speed, the limitcycle oscillation appeared. This oscillation disappeared and the small amplitude randam oscillation appeared, when the wind speed increased over the another higher critical wind speed, and the oscillation of the sphere damped rapidly even if the oscillation was made by the initial deformation due to outer disturbance. In the present study, eight series of the wind tunnel tests were done i. e. the two spheres and the four pairs of the spring were used. The limitcycle dynamic instability were observed in the Reynolds number range 3×103<Re<4×104. The ratio of the limitcycle dynamic instability disappearing critical wind speed to the one appearing wind speed was between 4.8 to 2.2 in the each wind tunnel test. The maximum vibration amplitude of the sphere oscillation was about 0.5d in the each test.

収録刊行物

  • 日本航空宇宙学会誌 = Journal of the Japan Society for Aeronautical and Space Sciences  

    日本航空宇宙学会誌 = Journal of the Japan Society for Aeronautical and Space Sciences 45(527), 719-727, 1997-12-05 

    一般社団法人 日本航空宇宙学会

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各種コード

  • NII論文ID(NAID)
    10002862267
  • NII書誌ID(NCID)
    AN00189072
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00214663
  • NDL 記事登録ID
    4353050
  • NDL 雑誌分類
    ZN25(科学技術--運輸工学--航空機・ロケット)
  • NDL 請求記号
    Z16-436
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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