| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Acoustic Calculation for Supersonic Turbulent Boundary Layer Flow |
| LI Xin-Liang, FU De-Xun, MA Yan-Wen, GAO Hui |
| LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 |
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| Cite this article: |
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LI Xin-Liang, FU De-Xun, MA Yan-Wen et al 2009 Chin. Phys. Lett. 26 094701 |
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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.
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| Keywords:
47.27.Sd
47.27.Ek
47.27.Nb
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Received: 19 May 2009
Published: 28 August 2009
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| PACS: |
47.27.Sd
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(Turbulence generated noise)
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47.27.ek
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(Direct numerical simulations)
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47.27.nb
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(Boundary layer turbulence ?)
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