Accession Number : AD0733590
Title : Fan-Compressor Noise: Prediction, Research, and Reduction Studies.
Descriptive Note : Final rept. 9 Jan 69-29 Jan 71,
Corporate Author : PRATT AND WHITNEY AIRCRAFT EAST HARTFORD CONN
Personal Author(s) : Burdsall,E. A. ; Urban,R. H.
Report Date : FEB 1971
Pagination or Media Count : 396
Abstract : A study of fan and compressor noise was undertaken for the development of an accurate prediction system, based on theoretical concepts and/or empirical data, which would enable the selection of proper acoustical design choices for future engines. Experimental programs were conducted using a variety of test rigs to provide acoustic data and to validate theoretical concepts. Mathematical models were developed for each type of fan noise, and their applicability to actual engines was evaluated. Although more work is needed to reduce further the contribution of fan and compressor noise to the total noise levels of future engines, the material presented represents significant progress in the understanding of particular noise-generating mechanisms and the capability to predict fan noise. (Author)
Descriptors : (*COMPRESSOR NOISE, *TURBOFAN ENGINES), (*FANS, *JET ENGINE NOISE), AIRCRAFT ENGINES, PREDICTIONS, REDUCTION, COMPRESSOR BLADES, BROADBAND, MATHEMATICAL MODELS
Subject Categories : Acoustics
Jet and Gas Turbine Engines
Distribution Statement : APPROVED FOR PUBLIC RELEASE