Noise generation by a subsonic jet near a locally reacting surface
Abstract
The far field of a subsonic jet near an impedance boundary is investigated by using Lighthill's acoustic analogy and the Green's function method. It is found that the acoustic properties of the surface have a significant effect on the generation and propagation of noise associated with turbulent gas flow. In particular, it is shown that the highest efficiency of noise generation by a boundary layer is observed in the case of an impedance boundary of the elastic type.
- Publication:
-
Akusticheskii Zhurnal
- Pub Date:
- August 1990
- Bibcode:
- 1990AkZh...36..611G
- Keywords:
-
- Acoustic Impedance;
- Gas Jets;
- Noise Generators;
- Subsonic Speed;
- Surface Noise Interactions;
- Gas Flow;
- Green'S Functions;
- Turbulent Flow;
- Acoustics