Abstract
The paper presents a computational model for acoustic scattering of a near-the-ground sound source around a body moving in a uniform flow. Using the method of images and the concept of reflection coefficient, the half space Green's function in a uniform flow is derived in the framework of the boundary element method (BEM). The method is validated against analytical solutions and is further applied in the case of acoustic scattering around an airfoil moving in the vicinity of the ground both for rigid and soft ground conditions. The results show the importance of ground impedance in the attenuation of sound.
| Original language | English |
|---|---|
| Pages (from-to) | 219-226 |
| Number of pages | 8 |
| Journal | Engineering Letters |
| Volume | 17 |
| Issue number | 4 |
| Publication status | Published - 19 Nov 2009 |
Keywords
- aerofoils
- boundary element methods
- method of images
- uniform flow
- sound