2020 Fiscal Year Final Research Report
Study on physical mechanism of Leadin edge receptivity of swept wing
Project/Area Number |
19K14892
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 19010:Fluid engineering-related
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Research Institution | Seikei University |
Principal Investigator |
Nishio Yu 成蹊大学, 理工学部, 助教 (70712743)
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Project Period (FY) |
2019-04-01 – 2021-03-31
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Keywords | 受容性 / 境界層 |
Outline of Final Research Achievements |
This study attempted to numerically investigate the physical mechanism of the leading edge receptivity to a vortical disturbance introduced into only a vicinity of the leading edge, focusing on the deformation of the vorticity pattern in the penetration process of the disturbance into the leading edge boundary layer. As a result, it was found that the streaky structure in the boundary layer is formed because the longitudinal vortex pairs are selectively amplified at the leading edge. A numerical experiment employing a partially slip condition at the leading edge wall suggests that the highly receptive point exists slightly downstream from the stagnation point of the leading edge, whereas the stagnation point has less effect on the leading edge receptivity.
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Free Research Field |
流体工学
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Academic Significance and Societal Importance of the Research Achievements |
前縁受容性は盛んに研究が行われているが,主な乱れの受容点である境界層が成長し始める物体前縁部における乱れの生成機構については,境界層が薄く計測が困難なこともあり未解明な点が多い。本研究ではこの問題に対して,直接数値計算を用いることで前縁付近の流れ場を再現し,渦度の変形や移流に着目し物理メカニズムの解明に取り組んだものである。得られた研究結果は,輸送機器の摩擦抵抗の増大を招く境界層遷移を遅らせる遷移制御の一助となる知見である。この遷移制御が可能となれば,流体機器,特に大型の輸送機器の輸送効率向上につながり,現在人類が抱える環境問題の解決にも貢献し得る。
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