Suscripción a Biblioteca: Guest
Fourth International Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2005, Marriot Hotel, Williamsburg, Virginia, USA

DOI: 10.1615/TSFP4

AIRFRAME NOISE PREDICTION BY MEAN OF A ZONAL RANS/LES APPROACH

pages 1165-1169
DOI: 10.1615/TSFP4.1940
Get accessGet access

SINOPSIS

Some hybrid CFD/CAA methods have generally to be used for the numerical simulation of trailing-edge noise (see Manoha et al. (2002) for instance). This study focusses on the first step of such hybrid methods, which is to get an accurate description of the unsteady aerodynamic sources by the mean of a 3D unsteady simulation of the flow. Such a simulation is however generally still away from the numerical capabilities of "usual" supercomputers. This paper proposes a zonal LES method for the numerical prediction of the aerodynamic noise sources. This method allows to perform only some zonal LES close to the main elements responsible of sound generation, while the overall configuration is only treated by a RANS approach. Attention will be paid to the particular boundary treatment at the interface between the RANS and LES regions. The method is first assessed in the simulation of a flat plate ended by a blunted trailing-edge, and then applied to the simulation of the flow over a NACA0012 airfoil with blunted trailing-edge.

Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones Precios y Políticas de Suscripcione Begell House Contáctenos Language English 中文 Русский Português German French Spain