Management of a Stronger Wall Jet by an Embedded Streamwise Vortex. (Reynolds Stresses Distributions and Evaluation of the Vorticity Transport Equation).
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An experimental study was carried out on the Reynolds stress distributions and production terms involved in the vorticity transport equation in a three-dimensional turbulence field of a stronger wall jet managed by an embedded streamwise vortex. Even in the strong three-dimensional flow field the mean velocity gradients 〓U / 〓y and 〓U / 〓z are of primary importance to the quantitative feature of the Reynolds shear stresses -(uv)^^- and -(uw)^^-, such as the maximal and minimal in their cross-stream distribution at a local streamwise position, respectively. A hypothesis of spanwise wandering of the introduced streamwise vortex was presented, to understand the large quantitative discrepancy in the stress-strain relationship between the Reynolds stress -(uw)^^- and the rate of strain Syz. The non-isotropic and non-uniform distributions of Reynolds stresses play a dominant role on the decay of the streamwise vortex. In a comparison with some results obtained in turbulent boundary layers disturbed by streamwise vortices, structural differences between the wall jet and the boundary layer reveal in the non-isotropy of the Reynolds shear stresses, -(uv)^^- and -(uw)^^-.
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 42 (1), 1-8, 1999
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
- 1390282679648281472
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- NII論文ID
- 130003816486
- 110003474403
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- NII書誌ID
- AA10888815
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- COI
- 1:CAS:528:DyaK1MXivFyjs7w%3D
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- ISSN
- 13475371
- 13408054
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- NDL書誌ID
- 4651045
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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