Abstract
The scattering of the sound of a jet engine by an airplane fuselage is modelled by solving the axially symmetric Helmholtz equation exterior to a long thin ellipsoid. The integral equation method based on the single layer potential formulation is used. A family of coordinate systems on the body is introduced and an algorithm is presented to determine the optimal co-ordinate system. Numerical results verify that the optimal choict enables the solution to be computed with a grid that is coarse relative to the wavelength.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 543-553 |
| Number of pages | 11 |
| Journal | Journal of Sound and Vibration |
| Volume | 60 |
| Issue number | 4 |
| DOIs | |
| State | Published - Oct 22 1978 |
Funding
t This report was prepared as a result of work performed under NASA Contract No. NASI-14101 while the author was in residence at ICASE, NASA Langley Research Center, Hampton, Virginia 23665, U.S.A.
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Acoustics and Ultrasonics
- Mechanical Engineering