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2 results on '"不安定撹乱"'

1. Behavior of unstable disturbances near the attachment line

Author

Kusumo, Prijo, Takagi, Shohei, Tokugawa, Naoko, Nishizawa, Akira, Ito, Nobutake, 高木 正平, 徳川 直子, 西沢 啓, 伊藤 信毅, Kusumo, Prijo, Takagi, Shohei, Tokugawa, Naoko, Nishizawa, Akira, Ito, Nobutake, 高木 正平, 徳川 直子, 西沢 啓, and 伊藤 信毅

Abstract

The latest linear theory shows that multiple instabilities co-exist in the region, where the flow becomes unstable at very low Reynolds number compared to that on the attachment line. An experimental investigation has been done focusing boundary-layer instability near the attachment line to clarify the phenomena, especially on which instability devotes to the drop of the critical Reynolds number. These experimental results are compared with the calculations done by the theory., 最近の線形理論は、付着線上の流れに比較して極低レイノルズ数時に流れが不安定になる領域では多重不安定性が共存することを示している。不安定性が臨界レイノルズ数の低下に特に作用する現象を明らかにするため、付着線近傍の境界層不安定性に焦点を当てて実験的な検討を行った。これらの実験結果を理論計算と比較した。

Published
2015

2. 付着線近傍の不安定撹乱の挙動

Author

Kusumo, Prijo, Takagi, Shohei, Tokugawa, Naoko, Nishizawa, Akira, and Ito, Nobutake

Subjects
不安定撹乱, 3次元境界層, 臨界レイノルズ数, transition process, streamline curvature instability, attachment line instability, 直交流不安定性, boundary layer instability, 付着線不安定性, 遷移過程, 流線曲率不安定性, cross flow instability, 境界層不安定性, multiple instability, 多重不安定性, unstable disturbance, critical Reynolds number, three dimensional boundary layer
Abstract

航空宇宙技術研究所 27-29 Sept.2000 東京 日本, National Aerospace Laboratory 27-29 Sept.2000 Tokyo Japan, 最近の線形理論は、付着線上の流れに比較して極低レイノルズ数時に流れが不安定になる領域では多重不安定性が共存することを示している。不安定性が臨界レイノルズ数の低下に特に作用する現象を明らかにするため、付着線近傍の境界層不安定性に焦点を当てて実験的な検討を行った。これらの実験結果を理論計算と比較した。, The latest linear theory shows that multiple instabilities co-exist in the region, where the flow becomes unstable at very low Reynolds number compared to that on the attachment line. An experimental investigation has been done focusing boundary-layer instability near the attachment line to clarify the phenomena, especially on which instability devotes to the drop of the critical Reynolds number. These experimental results are compared with the calculations done by the theory., 資料番号: AA0028637009, レポート番号: NAL SP-48T

Published
2000

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