Aerodynamic noise prediction in internal flows using LES and Linear Euler Equations

F. Crouzet; P. Lafon; T. Buchal; D. Laurence

Aerodynamic noise prediction in internal flows using LES and Linear Euler Equations

F. Crouzet, P. Lafon, T. Buchal, D. Laurence

Lamsid/EDF/R and D

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A hybrid computational method for the calculation of flow noise is presented: Large Eddy Simulation (LES) for the flow and Linearized Euler Equations (LEE) for the acoustic propagation. The source term that is introduced in the LEE is the one previously defined in the SNGR (Stochastic Noise Generation and Radiation) model. But instead of calculating this source term by means of a stochastic simulation of the fluctuating turbulent velocity field, it is directly calculated using the unsteady turbulent field given by the LES computations. This approach is applied to the case of a diaphragm in a duct. Two computations for two different upstream mean velocities are carried out. Source terms calculated on the LES grid are projected on the acoustic grid. The results are in good agreement with experimental ones.

Original language	English
Title of host publication	8th AIAA/CEAS Aeroacoustics Conference and Exhibit
Publication status	Published - 1 Dec 2002
Externally published	Yes
Event	8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002 - Breckenridge, CO, United States Duration: 17 Jun 2002 → 19 Jun 2002

Publication series

Name	8th AIAA/CEAS Aeroacoustics Conference and Exhibit

Conference

Conference	8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002
Country/Territory	United States
City	Breckenridge, CO
Period	17/06/02 → 19/06/02

Cite this

@inproceedings{d538a816f3224ec98bfbb7acd25b8b14,

title = "Aerodynamic noise prediction in internal flows using LES and Linear Euler Equations",

abstract = "A hybrid computational method for the calculation of flow noise is presented: Large Eddy Simulation (LES) for the flow and Linearized Euler Equations (LEE) for the acoustic propagation. The source term that is introduced in the LEE is the one previously defined in the SNGR (Stochastic Noise Generation and Radiation) model. But instead of calculating this source term by means of a stochastic simulation of the fluctuating turbulent velocity field, it is directly calculated using the unsteady turbulent field given by the LES computations. This approach is applied to the case of a diaphragm in a duct. Two computations for two different upstream mean velocities are carried out. Source terms calculated on the LES grid are projected on the acoustic grid. The results are in good agreement with experimental ones.",

author = "F. Crouzet and P. Lafon and T. Buchal and D. Laurence",

year = "2002",

month = dec,

day = "1",

language = "English",

isbn = "9781624101199",

series = "8th AIAA/CEAS Aeroacoustics Conference and Exhibit",

booktitle = "8th AIAA/CEAS Aeroacoustics Conference and Exhibit",

note = "8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002 ; Conference date: 17-06-2002 Through 19-06-2002",

}

TY - GEN

T1 - Aerodynamic noise prediction in internal flows using LES and Linear Euler Equations

AU - Crouzet, F.

AU - Lafon, P.

AU - Buchal, T.

AU - Laurence, D.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - A hybrid computational method for the calculation of flow noise is presented: Large Eddy Simulation (LES) for the flow and Linearized Euler Equations (LEE) for the acoustic propagation. The source term that is introduced in the LEE is the one previously defined in the SNGR (Stochastic Noise Generation and Radiation) model. But instead of calculating this source term by means of a stochastic simulation of the fluctuating turbulent velocity field, it is directly calculated using the unsteady turbulent field given by the LES computations. This approach is applied to the case of a diaphragm in a duct. Two computations for two different upstream mean velocities are carried out. Source terms calculated on the LES grid are projected on the acoustic grid. The results are in good agreement with experimental ones.

AB - A hybrid computational method for the calculation of flow noise is presented: Large Eddy Simulation (LES) for the flow and Linearized Euler Equations (LEE) for the acoustic propagation. The source term that is introduced in the LEE is the one previously defined in the SNGR (Stochastic Noise Generation and Radiation) model. But instead of calculating this source term by means of a stochastic simulation of the fluctuating turbulent velocity field, it is directly calculated using the unsteady turbulent field given by the LES computations. This approach is applied to the case of a diaphragm in a duct. Two computations for two different upstream mean velocities are carried out. Source terms calculated on the LES grid are projected on the acoustic grid. The results are in good agreement with experimental ones.

M3 - Conference contribution

AN - SCOPUS:84896862943

SN - 9781624101199

T3 - 8th AIAA/CEAS Aeroacoustics Conference and Exhibit

BT - 8th AIAA/CEAS Aeroacoustics Conference and Exhibit

T2 - 8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002

Y2 - 17 June 2002 through 19 June 2002

ER -

Aerodynamic noise prediction in internal flows using LES and Linear Euler Equations

Abstract

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Conference

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