Comparative analysis of turbulence models for slat noise source calculations employing unstructured meshes

Abstract

Three simulation methodologies (LNS, NLAS and URANS) were compared with respect to capturing the flow field and the acoustic sources in an accurate and computationally cheap 2D simulation of the high lift airfoil, MDA 30P30N. Different grid methodologies were tested using the commercial code CFD++, by Metacomp. Initial tests analyzed the solution grid dependency on a series of 2D simulations and promising results for the URANS and NLAS simulations were obtained. For the 3D simulation, the commercial code PowerFLOW, by Exa, based on Lattice-Boltzmann equation, was used. This tool was available to the group relatively recently and, as yet, only a single mesh configuration was tested. Consistent vortical structures were captured on the slat cove and good agreement with PSD results from the literature was obtained for low frequencies. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.