Necklace Vortex Excitation of Upstream Cylinder in Crisscross Circular Cylinder System(Influence of Cylinder Diameter, Gap and Damping Factor)
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- KUMAGAI Isao
- Department of Mechanical Engineering, Nagaoka University of Technology
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- MATSUMOTO Tsuyoshi
- Mitsubishi Heavy Industries, Ltd.
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- TAKAHASHI Tsutomu
- Department of Mechanical Engineering, Nagaoka University of Technology
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- SHIRAKASHI Masataka
- Department of Mechanical Engineering, Nagaoka University of Technology
書誌事項
- タイトル別名
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- Flow-Induced Vibration of Bluff Bodies. Necklace Vortex Excitation of Upstream Cylinder in Crisscross Circular Cylinder System. Influence of Cylinder Diameter, Gap and Damping Factor.
- (Influence of Cylinder Diameter, Gap and Damping Factor)
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The necklace vortex excitation, one of the longitudinal vortex excitations, appeared on the upstream cylinder in a crisscross circular cylinder system in uniform flow. The influence of the diameter ratio, gap-to-diameter ratio s/d and the logarithmic damping factor on the oscillation behavior caused by the necklace vortex excitation was investigated using a wind tunnel. The amplitude of the oscillation increases with increasing diameter ratio. The substantial fluctuating lift coefficient of the necklace vortex was introduced based on the spanwise dimension of the vortex, (CLR)'rms, and it was evaluated using the measurement of the oscillation amplitude. In the necklace vortex excitation region, the relationship between (CLR)'rms and the gap-to-diameter ratio collapses on a single curve irrespective of the diameter ratio of the two cylinders, and (CLR)'rms decreases with increasing gap-to-diameter ratio.
収録刊行物
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- JSME International Journal Series B Fluids and Thermal Engineering
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JSME International Journal Series B Fluids and Thermal Engineering 44 (4), 756-763, 2001
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001204675023744
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- NII論文ID
- 110003474309
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- NII書誌ID
- AA10888815
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- ISSN
- 13475371
- 13408054
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- NDL書誌ID
- 5978757
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可