Fan-Compressor Noise: Prediction, Research, and Reduction Studies.
Final rept. 9 Jan 69-29 Jan 71,
PRATT AND WHITNEY AIRCRAFT EAST HARTFORD CONN
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A study of fan and compressor noise was undertaken for the development of an accurate prediction system, based on theoretical concepts andor 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
- Jet and Gas Turbine Engines