書誌事項
- タイトル別名
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- Turbulence Production in a Jet Assessed by the Time-Repetitive Measurement of Instantaneous Velocity Distributions.
- シュンジ ソクド ブンプ ノ ジカンテキ ケイソク ニ ヨル フンリュウ ナイ ノ ミダレ セイセイ ヒョウカ
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Cross-correlation PIV is repetitively applied to obtain the time-change of instantaneous velocity vectors, which enables us to analyze turbulence kinetics. Each term in the balance equation of turbulence energy is evaluated, based on the ensembles of fluctuating velocities and instantaneous velocity-gradients, thereby finding primary factors of production and dissipation of turbulence energy. It is shown that turbulence production rate is high in the shear layer because of a large Reynolds stress, and viscous dissipation of turbulence energy occurs mainly near the jet axis. Furthermore, typical turbulence eddies in the shear layer are sampled to discuss the effect of instantaneous vortex-motions and fluctuating flows on turbulence production. It is observed that the pair of counter-rotating vortices appears and accelerates the flow in between, resulting in an increase in quantities of instantaneous Reynolds stress at a particular direction.
収録刊行物
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- 日本機械学会論文集B編
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日本機械学会論文集B編 66 (644), 970-975, 2000
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
- 1390001206182766848
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- NII論文ID
- 110002392955
- 130004223787
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- NII書誌ID
- AN00187441
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- ISSN
- 18848346
- 03875016
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- NDL書誌ID
- 5362070
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可