| Issue |
J. Phys. IV France
Volume 04, Number C5, Mai 1994
3ème Congrés français d'acoustique3rd French conference on acoustics |
|
|---|---|---|
| Page(s) | C5-939 - C5-942 | |
| DOI | https://doi.org/10.1051/jp4:19945205 | |
3ème Congrés français d'acoustique
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-939-C5-942
DOI: 10.1051/jp4:19945205
1 Ecole Centrale de Lyon, Laboratoire de Mécanique des Fluides et d'Acoustique, URA 263 du CNRS, ECL-BP. 163, 69131 Ecully cedex, France
2 Penn State University, Department of Mechanical Engineering University Park, PA 16802, U.S.A.
© EDP Sciences 1994
3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-939-C5-942
DOI: 10.1051/jp4:19945205
Estimation numérique du bruit rayonné par une turbulence homogène et isotrope, à l'aide d'un code de simulation directe et d'un code de simulation des grandes échelles
A. WITKOWSKA1, D. JUVÉ1 and J. BRASSEUR21 Ecole Centrale de Lyon, Laboratoire de Mécanique des Fluides et d'Acoustique, URA 263 du CNRS, ECL-BP. 163, 69131 Ecully cedex, France
2 Penn State University, Department of Mechanical Engineering University Park, PA 16802, U.S.A.
Abstract
Lighthill's acoustic analogy is combined with a numerical simulation of homogeneous and isotropic turbulence in order to evaluate the farfield noise. Two different codes are used : a Large Eddy Simulation code and a Direct Numerical Simulation code. First, the form of the acoustic analogy to be used is analyzed. Then, the acoustic pressure is computed for several realizations of the turbulent field. Finally, nondimensional acoustic power is obtained from an ensemble average of acoustic pressure. The results computed with the two simulations are shown to be in good agreement.
© EDP Sciences 1994