Abstract
2D Large Eddy Simulation turbulence model coupled with Ffowcs-Williams-Hawkins model and Boundary Element Method is used to perform a study of the effect of the Reynolds number on the broadband noise emitted due to the incompressible fluid structure interaction. The method is then used to calculate the broadband noise emitted by the aerodynamic flow over different shape bodies having same cross-sectional area with the intent to know the most suitable cross sectional geometry of the fuel manifolds in the aircraft engine afterburner in terms of minimum noise emission. The results obtained suggests that a 5dB benefit in sound emission could be obtained by the halving the diameter of the circular cross-section used for the fuel manifolds, to make them elliptical keeping cross sectional area constant.
Publisher
Trans Tech Publications, Ltd.
Reference15 articles.
1. W. Rodi, On the simulation of turbulent flow past bluff bodies. J. Wind Eng. Ind. Aerodyn., 46-47 (1993) pp.3-19.
2. S. Murakami, A. Mochida, On turbulent vortex shedding flow past a square cylinder predicted by CFD. J. Wind Eng. Ind. Aerodyn., 54 (1995) pp.191-211.
3. D. Bouris and G. Bergeles, 2D LES of vortex shedding from a square cylinder. J. Wind Eng. Ind. Aerodyn., 90 (1999) pp.31-46.
4. A. Leonard, Energy cascade in large eddy simulations of turbulent fuid fow. Adv. In Geophys, 18A, p.237. (1974).
5. J. H. Ferziger, Higher Level Simulations of Turbulent Flow, in Computational Methods for Turbulent, Transonic and Viscous Flows. J. A. Essers ed., Hemisphere. (1983).