| Project/Area Number |
24760134
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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 | Toyohashi University of Technology |
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Principal Investigator |
HIROSHI Yokoyama 豊橋技術科学大学, 工学(系)研究科(研究院), 助教 (60581428)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 音響 / 空力音響 / 乱流 / 直接計算 / 騒音 |
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| Research Abstract |
In order to clarify dominant aerodynamic sound sources with regard to the sound generated from flows around a rectangular cylinder, decoupled simulations based on the Lighthill's acoustic analogy are performed. In these decoupled simulations, acoustic fields are predicted by the acoustic simulations using the Lighthill's tensor, which is computed by incompressible flow simulations. As a result, the acoustic sources in the region corresponding to 6 vortices mainly contribute to the far acoustic field. This indicates that the vortical deformation and development contribute to the acoustic radiation. For the prediction of the acoustic field, the acoustic sources in the above-mentioned region need to be captured. This knowledge is applied to the cavity flows and the flows around a cascade of flat plates.
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