2012 Fiscal Year Final Research Report
Unsteady Aerodynamics Prediction of Low-Reynolds-Number Airfoils
| Project/Area Number |
23760169
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Japan Aerospace Exploration Agency |
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Principal Investigator |
IKEDA Tomoaki 独立行政法人宇宙航空研究開発機構, 研究開発本部, 研究員 (00443276)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 圧縮流 / 音響 |
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| Research Abstract |
In a rarefied atmosphere, for instance, at an ultra-high altitude, the Reynolds number based on flight velocity and airfoil's length scale is lowered significantly. Besides, the flight velocity is usually far greater than that of hobby model planes, flying near ground surface; therefore, the Mach number becomes relatively high, although it is still subsonic. In this study, we would experimentally reproduce the coupling between acoustic and hydrodynamic disturbances, using wind-tunnel facilities. A model airfoil is placed in a rarefied flow, achieved in a low-pressure wind-tunnel. The frequency characteristics obtained in the experiments agree well with our numerical analysis, which strongly suggests the existence of acoustic-hydrodynamic coupling at low Reynolds number.
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