Study on effects of surface roughness on the boundary-layer instability for accurate transition prediction
| Project/Area Number |
21560820
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Aerospace engineering
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
ASAI Masahito 首都大学東京, 大学院・システムデザイン研究科, 教授 (00117988)
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| Co-Investigator(Kenkyū-buntansha) |
INASAWA Ayumu 首都大学東京, 大学院・システムデザイン研究科, 助教 (70404936)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 流れの安定性 / 乱流遷移 / 境界層 / 壁面粗さ / 境界層遷移 / 壁面せん断流 / トルミーン・シュリヒティング波動 |
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| Research Abstract |
Effects of 2D and 3D surface corrugation with roughness Reynolds numbers less than 5 on the growth of T-S waves were examined experimentally in a zero-pressure-gradient boundary layer. A distinct difference was found in the destabilizing effect between 2D and 3D corrugations. 2D surface corrugation promotes the growth of T-S waves significantly, while the destabilizing effect of 3D corrugation is much weaker than that of 2D corrugation. Destabilizing effects of surface corrugation were also examined both experimentally and numerically in plane Poiseuille flow.
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Report
(4 results)
Research Products
(15 results)
