NOISE PREDICTION TECHNOLOGY FOR CTOL AIRCRAFT
The application of a new aircraft noise prediction program to CTOL noise prediction is outlined. Noise prediction is based on semiempirical methods for each of the propulsive system noise sources, such as the fan, the combustor, the turbine, and jet mixing, with noise-critical parameter values derived from the thermodynamic cycle of the engine. Comparisons of measured and predicted noise levels for existing CTOL aircraft indicate an acceptable level of accuracy.
- Conf-Presented at the CTOL Transport Tech. Conf., Hampton, VA., 28 Feb. - 3 Mar. 1978.
Langley Research CenterNational Aeronautics and Space Administration
Hampton, VA United States 23665
- Raney, J P
- Publication Date: 1978-5
- Pagination: 16 p.
- TRT Terms: Aircraft; Aircraft noise; Engines; Forecasting; Jet engines; Mathematical prediction; Measurement; Noise; Sound level; Thermodynamics; Turbines
- Uncontrolled Terms: Aircraft engines; Noise measurement
- Old TRIS Terms: Jet engine noise
- Subject Areas: Aviation; Environment; Vehicles and Equipment;
- Accession Number: 00181647
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: NASA-TM-78700
- Files: TRIS
- Created Date: Oct 31 1979 12:00AM