Samenvatting
The filtered fluid dynamic equations are discretized in space by a high-order spectral difference (SD) method coupled with large eddy simulation (LES) approach. The subgrid-scale stress tensor is modelled by the wall-adapting local eddy-viscosity model (WALE). We solve the unsteady equations by advancing in time using a second-order backward difference formulae (BDF2) scheme. The nonlinear algebraic system arising from the time discretization is solved with the nonlinear lower-upper symmetric Gauss-Seidel (LU-SGS) algorithm. The SD/LES method provides the acoustic sources for aerodynamic sound field simulation. The numerical noise simulation is based on the Ffowcs-Williams Hawkings (FW-H) approach, which provides noise contributions for monopole, dipole and quadrupole acoustic sources. The contribution of the present paper is the assessment of this wave propagation method and its capability to be coupled with a high-order SD CFD solver. The flow around a two-dimensional (2D) circular cylinder at Re = 150 and M = 0.2, the flat plate interaction with the near-wake of a 2D square cylinder at Re = 150 and M=0.2 and the flow in a 2D muffler at Re = 46647 and M=0.05 have been chosen as test cases. The methodology is currently being extended to improve the efficiency of three-dimensional (3D) Large Eddy Simulation. The flow induced noise simulation for a 3D muffler will be shown in the full paper.
Originele taal-2 | English |
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Titel | AIAA paper, 3816- 2010, American Institute of Aeronautics and Astronautics |
Status | Published - 7 jun 2010 |
Evenement | Unknown - Stockholm, Sweden Duur: 21 sep 2009 → 25 sep 2009 |
Conference
Conference | Unknown |
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Land/Regio | Sweden |
Stad | Stockholm |
Periode | 21/09/09 → 25/09/09 |