Multi-Instability Analysis of Swept-Wing Boundary Layers Part2. Effects of Wall Curvature and Nonparallelism on the e^N Method
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概要
- 論文の詳細を見る
Multi-instability characteristics of the three-dimensional boundary layer around a yawed circular cylinder are investigated by an eN method involving the effects of wall curvature and nonparallelism. Velocity profiles of the boundary layer are approximated by members of Falkner-Skan-Cooke similarity solutions and the local dispersion relation of each member is determined from the nonparallel eigenvalue problem proposed in part 1 of this study. A complex ray theory is adopted in the integration procedure for N factor, and a numerical estimation of N is made to describe wedge-shaped disturbances originating from a point source. The analysis using these methods shows that the influence of wall curvature and nonparallelism stabilizes and destabilizes the flow, respectively, though their quantitative effects on the N factor depend on kinds of instability, range of frequency, and values of flow parameters. It is also found that the destabilizing effect of nonparallelism increases with the increase of sweep angle.
- 社団法人 日本航空宇宙学会の論文
- 2002-11-04
著者
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YAMAMOTO Kiyoshi
National Aerospace Laboratory
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ITOH Nobutake
National Aerospace Laboratory
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Atobe Takashi
National Aerospace Laboratory
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Yamamoto Kiyoshi
National Aeronautics Laboratory
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YAMAMOTO Kiyoshi
National Aarospace Laboralory
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