書誌事項
- タイトル別名
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- Coherent Structures in a Fully Developed Stage of a Non-isothermal Round Jet
- ヒトウオン エンケイ フンリュウ ノ ハッタツ リョウイキ ニ オケル ソシキ コウゾウ
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Direct numerical simulation (DNS) was performed for a non-isothermal air jet of the Reynolds number equal to 1 200 in order to reveal coherent structures of the jet. Fourth-order central finite difference was applied to the simulation. Effort was also made for experimental visualization (dye mixing and PTV) supporting the validity of instantaneous structures by DNS. Computational results for two kind of inlet profiles suggested that nozzle conditions scarcely affect turbulent statistics and coherent structures in jet-established-stage. Two-point correlations of velocity and temperature show similar distributions denoting that temperature can be used as a indicator of a vortex. Conceptual model of hairpin-shape vortex was proposed and validated by the two-point correlations and the PDF analysis for vorticity alignment; the hairpin-shape vortex stands with legs inclined downstream, and the inclination angle and the tilting angle between two legs are -45° and 40°, respectively.
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 69 (681), 1200-1207, 2003
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
- 1390001206262062976
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- NII論文ID
- 110002388091
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- NII書誌ID
- AN00187441
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- ISSN
- 18848346
- 03875016
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- HANDLE
- 10191/5768
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- NDL書誌ID
- 6599721
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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
- IRDB
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可