A hybrid prediction method for low-subsonic turbulent flow noise
- Authors
- Moon, Y. J.; Seo, J. H.; Bae, Y. M.; Roger, M.; Becker, S.
- Issue Date
- 8월-2010
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Turbulent noise; Low subsonic flow; LES/LPCE hybrid method
- Citation
- COMPUTERS & FLUIDS, v.39, no.7, pp.1125 - 1135
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMPUTERS & FLUIDS
- Volume
- 39
- Number
- 7
- Start Page
- 1125
- End Page
- 1135
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/115929
- DOI
- 10.1016/j.compfluid.2010.02.005
- ISSN
- 0045-7930
- Abstract
- A hybrid method is proposed for prediction of low-subsonic, turbulent flow noise. In this method, the noise sources in the near wall turbulences or in the wake are computed by the incompressible large eddy simulation (LES), while the generation and propagation of the acoustic waves are solved by the linearized perturbed compressible equations (LPCE), with acoustic sources represented by a material derivative of the hydrodynamic pressure, DP/Dt. The accuracy of the present method is critically assessed for two experiments conducted at the Ecole Centrale de Lyon and the University Erlangen, where aeroacoustic measurements were taken for (i) the flat plate self-noise at zero angle of attack (Re(c) = 1 3 x 10(5), M = 0 06) and (ii) the forward-facing step noise (Re(h) = 8000, M = 0 03), respectively. The noise sources are identified and analyzed further to determine their spectral-dependent, spanwise coherence functions, gamma(y) of the wall pressure fluctuations, in order to quantify the sizes of the noise sources The far-field sound pressure level (SPL) spectra predicted by the present method are found in excellent agreement with the experimental measurements (C) 2010 Elsevier Ltd. All rights reserved
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.