Jet noise: A status report
Abstract
Major investigations were conducted in a recently constructed jet noise facility to measure the noise produced by the turbulent mixing of gases downstream of the nozzle exit plane, the additional noise arising from the presence of shock waves in the jet exhaust, and the excess tailpipe noise arising either from within the engine, or generated at the nozzle exit plane because of engine promoted flow disturbances. Specific attention was given to: (1) the cold subsonic jet; (2) the effects of jet temperature; (3) the overall levels and spectral characteristics of shock associated noise; and (4) excess noise, possibly generated by a highly turbulent exit flow.
- Publication:
-
In Von Karman Inst. for Fluid Dyn. Advan. in Turbulent Shear Flows 26 p (SEE N79-23373 14-34
- Pub Date:
- March 1973
- Bibcode:
- 1973atsf.vkifR....L
- Keywords:
-
- Aerodynamic Noise;
- Jet Aircraft Noise;
- Jet Mixing Flow;
- Noise Reduction;
- Shock Waves;
- Turbulent Mixing;
- Anechoic Chambers;
- Lighthill Method;
- Noise Spectra;
- Noise Temperature;
- Spectrum Analysis;
- Supersonic Jet Flow;
- Fluid Mechanics and Heat Transfer