Abstract
A prediction method for aerodynamic noise from long-span bodies is proposed. The present method is based on the hybrid method, and consists of (i) incompressible large eddy simulation (LES), (ii) linearized perturbed compressible equations (LPCE) for 2D acoustic field at spanwise wave number, kz=0, (iii) 2D Kirchhoff method, Oberai's 3D-correction for spectral acoustic pressure at the far-field, and (iv) estimation of the far-field SPL for a long-span body with considering spanwise coherence function. In the present study, accuracy of the hybrid methods is assessed by considering turbulent flow noise problems for a fundamental aerodynamic body with long span. The nose from a circular cylinder with 30D span at ReD=4.6×104 and M=0.21 is predicted with the present methodology. Aerodynamic and aeroacoustic results are compared with the experimental data. Also, fundamental issues on computations of acoustic field, and estimation methods for SPL will be discussed in conjunction with the proper flow physics.
| Original language | English |
|---|---|
| Title of host publication | Collection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference |
| Pages | 2151-2166 |
| Number of pages | 16 |
| Volume | 4 |
| Publication status | Published - 2006 Dec 27 |
| Event | 12th AIAA/CEAS Aeroacoustics Conference - Cambridge, MA, United States Duration: 2006 May 8 → 2006 May 10 |
Other
| Other | 12th AIAA/CEAS Aeroacoustics Conference |
|---|---|
| Country | United States |
| City | Cambridge, MA |
| Period | 06/5/8 → 06/5/10 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Aerodynamic noise prediction for long-span bodies. / Seo, J. H.; Chang, K. W.; Moon, Young June.
Collection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference. Vol. 4 2006. p. 2151-2166.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Aerodynamic noise prediction for long-span bodies
AU - Seo, J. H.
AU - Chang, K. W.
AU - Moon, Young June
PY - 2006/12/27
Y1 - 2006/12/27
N2 - A prediction method for aerodynamic noise from long-span bodies is proposed. The present method is based on the hybrid method, and consists of (i) incompressible large eddy simulation (LES), (ii) linearized perturbed compressible equations (LPCE) for 2D acoustic field at spanwise wave number, kz=0, (iii) 2D Kirchhoff method, Oberai's 3D-correction for spectral acoustic pressure at the far-field, and (iv) estimation of the far-field SPL for a long-span body with considering spanwise coherence function. In the present study, accuracy of the hybrid methods is assessed by considering turbulent flow noise problems for a fundamental aerodynamic body with long span. The nose from a circular cylinder with 30D span at ReD=4.6×104 and M=0.21 is predicted with the present methodology. Aerodynamic and aeroacoustic results are compared with the experimental data. Also, fundamental issues on computations of acoustic field, and estimation methods for SPL will be discussed in conjunction with the proper flow physics.
AB - A prediction method for aerodynamic noise from long-span bodies is proposed. The present method is based on the hybrid method, and consists of (i) incompressible large eddy simulation (LES), (ii) linearized perturbed compressible equations (LPCE) for 2D acoustic field at spanwise wave number, kz=0, (iii) 2D Kirchhoff method, Oberai's 3D-correction for spectral acoustic pressure at the far-field, and (iv) estimation of the far-field SPL for a long-span body with considering spanwise coherence function. In the present study, accuracy of the hybrid methods is assessed by considering turbulent flow noise problems for a fundamental aerodynamic body with long span. The nose from a circular cylinder with 30D span at ReD=4.6×104 and M=0.21 is predicted with the present methodology. Aerodynamic and aeroacoustic results are compared with the experimental data. Also, fundamental issues on computations of acoustic field, and estimation methods for SPL will be discussed in conjunction with the proper flow physics.
UR - http://www.scopus.com/inward/record.url?scp=33845642592&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33845642592&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33845642592
SN - 1563478099
SN - 9781563478093
VL - 4
SP - 2151
EP - 2166
BT - Collection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference
ER -