圧縮性せん断流れの二次不安定性により誘起される縦渦構造 [in Japanese] Streamwise Vortex Structure Induced by Secondary Instability of Compressible Shear Flow [in Japanese]
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- 大坂 淳 OSAKA Jun
- 東京大学工学系研究科航空宇宙工学専攻
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- 野田 大介 NODA Daisuke
- 東京大学新領域創成科学研究科
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- 今村 宰 [他] IMAMURA Osamu
- 東京大学新領域創成科学研究科
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- 荒木 幹也 ARAKI Mikiya
- 群馬大学工学部機械システム工学科
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- 津江 光洋 TSUE Mitsuhiro
- 東京大学工学系研究科航空宇宙工学専攻
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- 河野 通方 KONO Michikata
- 東京大学新領域創成科学研究科
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Author(s)
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- 大坂 淳 OSAKA Jun
- 東京大学工学系研究科航空宇宙工学専攻
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- 野田 大介 NODA Daisuke
- 東京大学新領域創成科学研究科
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- 今村 宰 [他] IMAMURA Osamu
- 東京大学新領域創成科学研究科
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- 荒木 幹也 ARAKI Mikiya
- 群馬大学工学部機械システム工学科
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- 津江 光洋 TSUE Mitsuhiro
- 東京大学工学系研究科航空宇宙工学専攻
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- 河野 通方 KONO Michikata
- 東京大学新領域創成科学研究科
Abstract
Streamwise vortex structure induced by secondary instability of compressible shear flow was numerically investigated. Parallel shear flow with convective Mach number 0.4 was used in the present study. From linear stability analysis, existence of streamwise vortex structure components was confirmed, and scale ratio λ<SUB>z</SUB>/λ<SUB>x</SUB> which gives maximum amplification rate was specified. In addition, spatially evolving shear flow was investigated by three-dimensional calculation. Streamwise vortex structure similar to that gotten from linear stability analysis was observed. In the case where white-noise-like disturbance was introduced, growth rate of shear layer was estimated and effect of streamwise vortex structure on growth of shear layer was investigated. Due to streamwise vortex structure induced by secondary instability, growth rate in three-dimensional calculation was larger than the case of two-dimensional case.
Journal
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- JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 53(623), 541-547, 2005-12-05
THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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