J.C. Hardin, D.S. Pope

A new technique for the numerical analysis of aerodynamic noise generation is developed. The approach involves first solving for the time-dependent incompressible flow for the given geometry. A "hydrodynamic" density correction to the constant incompressible density is then calculated from a knowledge of the incompressible pressure fluctuations. The compressible flow solution is finally obtained by considering perturbations about the "corrected" incompressible flow. This fully nonlinear technique, which is tailored to extract the relevant acoustic fluctuations, appears to be an efficient approach to the numerical analysis of aerodynamic noise generation. Applications of this technique to problems of interest, including some with moderately high subsonic Mach numbers, are presented in the paper.

DGLR/AIAA 14th Aeroacoustics Conference, 1992

Conference Paper

englisch

21,0 x 29,7 cm, 9 Seiten

DGLR-Bericht, 1992, 1992-03, DGLR/AIAA 14th Aeroacoustics Conference - Proceedings; S.448-456; 1992; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroacoustics

Bibliothek

1992