Abstract
A hybrid method is presented for efficient computation of turbulent flow noise at low Mach numbers. In this method, the turbulent flow field is computed by incompressible large eddy simulation (LES), while the acoustic field is computed with the linearized perturbed compressible equations (LPCE) derived in this study. Since LPCE is computed on the rather coarse acoustic grid with the flow variables and source term obtained by the incompressible LES, the computational efficiency of calculation is greatly enhanced. Furthermore, LPCE suppress the instability of perturbed vortical mode and therefore secure consistent and stable acoustic solutions. The proposed LES/LPCE hybrid method is applied to three low Mach number turbulent flow noise problems: i) circular cylinder, ii) isolated flat plate, and iii) interaction between cylinder wake and airfoil. The computed results are closely compared with the experimental measurements.
| Original language | English |
|---|---|
| Pages (from-to) | 814-821 |
| Number of pages | 8 |
| Journal | Transactions of the Korean Society of Mechanical Engineers, B |
| Volume | 31 |
| Issue number | 9 |
| Publication status | Published - 2007 Sep 1 |
Fingerprint
Keywords
- Computational aeroacoustics
- Hybrid method
- Turbulent flow noise
ASJC Scopus subject areas
- Mechanical Engineering
Cite this
Efficient computation of turbulent flow noise at low mach numbers via hybrid method. / Seo, Jung H.; Moon, Young June.
In: Transactions of the Korean Society of Mechanical Engineers, B, Vol. 31, No. 9, 01.09.2007, p. 814-821.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Efficient computation of turbulent flow noise at low mach numbers via hybrid method
AU - Seo, Jung H.
AU - Moon, Young June
PY - 2007/9/1
Y1 - 2007/9/1
N2 - A hybrid method is presented for efficient computation of turbulent flow noise at low Mach numbers. In this method, the turbulent flow field is computed by incompressible large eddy simulation (LES), while the acoustic field is computed with the linearized perturbed compressible equations (LPCE) derived in this study. Since LPCE is computed on the rather coarse acoustic grid with the flow variables and source term obtained by the incompressible LES, the computational efficiency of calculation is greatly enhanced. Furthermore, LPCE suppress the instability of perturbed vortical mode and therefore secure consistent and stable acoustic solutions. The proposed LES/LPCE hybrid method is applied to three low Mach number turbulent flow noise problems: i) circular cylinder, ii) isolated flat plate, and iii) interaction between cylinder wake and airfoil. The computed results are closely compared with the experimental measurements.
AB - A hybrid method is presented for efficient computation of turbulent flow noise at low Mach numbers. In this method, the turbulent flow field is computed by incompressible large eddy simulation (LES), while the acoustic field is computed with the linearized perturbed compressible equations (LPCE) derived in this study. Since LPCE is computed on the rather coarse acoustic grid with the flow variables and source term obtained by the incompressible LES, the computational efficiency of calculation is greatly enhanced. Furthermore, LPCE suppress the instability of perturbed vortical mode and therefore secure consistent and stable acoustic solutions. The proposed LES/LPCE hybrid method is applied to three low Mach number turbulent flow noise problems: i) circular cylinder, ii) isolated flat plate, and iii) interaction between cylinder wake and airfoil. The computed results are closely compared with the experimental measurements.
KW - Computational aeroacoustics
KW - Hybrid method
KW - Turbulent flow noise
UR - http://www.scopus.com/inward/record.url?scp=34548591487&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34548591487&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:34548591487
VL - 31
SP - 814
EP - 821
JO - Transactions of the Korean Society of Mechanical Engineers, B
JF - Transactions of the Korean Society of Mechanical Engineers, B
SN - 1226-4881
IS - 9
ER -