Acoustic Calculation for Supersonic Turbulent Boundary Layer Flow
Data(s) |
2009
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Resumo |
An approach which combines direct numerical simulation (DNS) with the Lighthill acoustic analogy theory is used to study the potential noise sources during the transition process of a Mach 2.25 flat plate boundary layer. The quadrupole sound sources due to the flow fluctuations and the dipole sound sources due to the fluctuating surface stress are obtained. Numerical results suggest that formation of the high shear layers leads to a dramatic amplification of amplitude of the fluctuating quadrupole sound sources. Compared with the quadrupole sound source, the energy of dipole sound source is concentrated in the relatively low frequency range. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Chinese Physics Letters.2009,26(9):094701-1-4 |
Palavras-Chave | #流体力学::分层流 #DIRECT NUMERICAL-SIMULATION #SOUND |
Tipo |
期刊论文 |