Computation of aerodynamic sound radiation from flows past a wing
Abstract
The random noise induced by vortex shedding from two dimensional wings at 8- and 12-deg angles of attack in a subsonic flow is investigated numerically. A highly accurate finite difference method is used for 3D compressible Navier-Stokes equations to analyze a turbulent flow on a wing. The acoustic far-field is evaluated from the pressure fluctuation on the wing surface. The computed results are compared successfully with the experimental data. The surface dipole strength density is obtained to investigate the typical sound radiation mechanism for several frequency regions.
- Publication:
-
14th DGLR/AIAA Aeroacoustics Conference
- Pub Date:
- 1992
- Bibcode:
- 1992dglr.conf..929A
- Keywords:
-
- Aeroacoustics;
- Random Noise;
- Thin Airfoils;
- Turbulent Flow;
- Vortex Shedding;
- Compressible Flow;
- Far Fields;
- Finite Difference Theory;
- Flow Distribution;
- Navier-Stokes Equation;
- Turbulent Boundary Layer;
- Vortices;
- Acoustics