2011 Fiscal Year Final Research Report
Numerical analysis of the low-frequency noise emitted from a cylindrical and plane boundary layer
| Project/Area Number |
22760125
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | University of Toyama |
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Principal Investigator |
WATANABE Daisuke 富山大学, 大学院・理工学研究部(工学), 講師 (70363033)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 低周波音 / 境界層 / 乱流 / CFD / DNS / 騒音 |
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| Research Abstract |
Spatial direct numerical simulations are used to study the development of turbulent structures and the resultant sound emission mechanism in a compressible boundary layer. Disturbances of compressible isotropic turbulence with the amplitude change for spanwise direction are superimposed on the laminar profile at the inlet boundary layer in the computational box. Simulation results show that the inlet disturbances affect the transition region and suppress the low-frequency velocity/pressure fluctuations in a subsonic cylindrical boundary layer.
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