Influence of Cross-sectional Configuration on the Synchronization of Karman Vortex Shedding with the Cylinder Oscillation.
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- KOIDE Mizuyasu
- Department of Mechanical Engineering, Nagaoka University of Technology
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- TOMIDA Shouji
- Instruments, HITACHI, Ltd.
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- TAKAHASHI Tsutomu
- Department of Mechanical Engineering, Nagaoka University of Technology
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- BARANYI László
- Department of Fluid and Heat Engineering, University of Miskolc
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- SHIRAKASHI Masataka
- Department of Mechanical Engineering, Nagaoka University of Technology
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The influence of cross-sectional configuration of a cylindrical body on the lock-in phenomenon of Kármán vortex shedding was investigated using a mechanical oscillator for cross-flow oscillation of the cylinder. A circular, a semi-circular and a triangular cylinder with an equal height were used as test cylinders to see the effect of the movement of the separation point. The lock-in criteria accounting for the spanwise coherency of the Kármán vortex were discussed based on the experimental data under a fixed Reynolds number of around 3500. The lock-in region on the plane of non-dimensional cylinder frequency and the non-dimensional amplitude was almost the same for all of the cylinders in spite of differences in the range of the separation point movement. The minimum value of non-dimensional threshold amplitude for lock-in was much smaller than the value of 0.05 which was reported so far. Results obtained in this work imply that the movement of the separation point is a result of the lock-in phenomenon, rather than an essential cause.
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 45 (2), 249-258, 2002
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
- 1390282679653170048
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- NII論文ID
- 110003479035
- 30002105832
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- NII書誌ID
- AA10888815
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- ISSN
- 13475371
- 13408054
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- NDL書誌ID
- 6166115
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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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- 使用不可