Acoustic radiation from a circular cylinder in a subsonic stream
Abstract
An analysis regarding the diffraction of sound by a circular cylinder in still air conducted by Levine and Schwinger (1948) and by Morgan (1971) is considered. Attention is given to the modifications of the still air analysis in the presence of a moving stream. A case involving the presence of a cylindrical vortex layer, which is attached to the end of the cylinder, is also investigated. It is pointed out that the reported investigation is of some practical importance in the prediction of the acoustic radiation from a jet engine in motion. In the employed model the jet engine is represented by a rigid circular cylinder of negligible thickness.
- Publication:
-
Journal of the Institute of Mathematics and Its Applications
- Pub Date:
- August 1975
- Bibcode:
- 1975JIMIA..16....1M
- Keywords:
-
- Circular Cylinders;
- Far Fields;
- Sound Waves;
- Subsonic Flow;
- Vortices;
- Wave Propagation;
- Boundary Value Problems;
- Cylindrical Shells;
- Exhaust Gases;
- Flow Velocity;
- Jet Engines;
- Kutta-Joukowski Condition;
- Plane Waves;
- Radiation Distribution;
- Sound Fields;
- Sound Intensity;
- Turbulent Wakes;
- Wave Diffraction;
- Acoustics