| Title: | Acoustic Calculation for Supersonic Turbulent Boundary Layer Flow |
| Authors: | Li XL(李新亮); Fu DX(傅德薰); Ma YW(马延文); Gao H(高慧) |
| Issue Date: | 2009 |
| Abstract: | 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. |
| URI: | http://dspace.imech.ac.cn/handle/311007/33060 |
| discipline: | 流体力学::分层流 |
| Citation: | Chinese Physics Letters.2009,26(9):094701-1-4 |
| Appears in Collections: | 高温气体动力学重点实验室_期刊论文
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