書誌事項
- タイトル別名
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- Unsteady Boundary Layers : 4th Report, Calculation of Boundary Layer Around a Body with Arbitrary Shape by the Use of a Series Expansion Method
- ヒテイジョウ キョウカイソウ ノ ケンキュウ 4
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抄録
A method of calculating the unsteady laminar boundary layer is presented. Two-dimensional flow of an incompressible fluid is assumed. The case of an oscillating outer flow, about a time-mean value, with a small amplitude and at relatively low frequency, is considered. By the use of a power-series expansion method, boundary layer around a body with an arbitrary shape and with a wedge-shaped nose of arbitrary angle, can be calculated. The solution is obtained as a linear combination of a set of universal functions. Velocity fluctuations in the boundary layer, of second order in magnitude, are taken into account. The time-mean velocity at a point in the boundary layer shifts as the amplitude of outside flow oscillation is increased. At the same time, the second harmonic fluctuation is produced. The method of calculation is applied to the boundary layer of a circular cylinder, and it is found that the influence of the second order velocity change is rather small, even at the outside velocity fluctuation 0.5 times the mean velocity.
収録刊行物
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- 日本機械学會論文集
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日本機械学會論文集 27 (183), 1731-1740, 1961
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
- 1390001205158913024
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- NII論文ID
- 110002351532
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- NII書誌ID
- AN00187419
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- ISSN
- 21859485
- 00290270
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- NDL書誌ID
- 9150883
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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
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可