Transition to Turbulence and Velocity Distribution near the Entrance in Constant-Acceleration Pipe Flow Started from Steady Laminar State
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- NAKAHATA Yusuke
- 大阪電気通信大学大学院工学研究科博士課程
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- KNISELY Charles W.
- Mechanical Engineering Department, Bucknell University
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- NISHIHARA Kazuyoshi
- 大阪電気通信大学大学院工学研究科
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- SASAKI Yasushi
- 東北大学大学院工学研究科
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- IGUCHI Manabu
- 北海道大学大学院工学研究科
Bibliographic Information
- Other Title
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- 定常層流状態から始動する円管内等加速度流れの管入口近傍における乱流遷移と速度分布
- テイジョウ ソウリュウ ジョウタイ カラ シドウスル エンカンナイ トウカソクド ナガレ ノ カン イリグチ キンボウ ニ オケル ランリュウ センイ ト ソクド ブンプ
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Abstract
Transition to turbulence of a laminar pipe flow accelerated from steady laminar state at a constant acceleration has been experimentally investigated. Air is used as the working fluid and the axial velocity component of the constant-acceleration flow near the entrance of the pipe is measured with a hot-wire anemometer. Transition to turbulence is judged based on the velocity signal and the RMS value of the velocity fluctuation. The results are compared with those obtained for a constant-acceleration pipe flow started from rest. The measured value of the critical Reynolds number in the former case is greater than that in the latter case. The amplification of disturbance does not occur when the initial flow is laminar unlike the case that the liquid is initially at rest.
Journal
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- Journal of the Japanese Society for Experimental Mechanics
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Journal of the Japanese Society for Experimental Mechanics 7 (2), 162-167, 2007
The Japanese Society for Experimental Mechanics
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Details 詳細情報について
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- CRID
- 1390001205190702720
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- NII Article ID
- 130004489924
- 10019742712
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- NII Book ID
- AA11822914
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- ISSN
- 18844219
- 13464930
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- NDL BIB ID
- 8886098
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed