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Some Aspects of Engine Noise*

Published online by Cambridge University Press:  04 July 2016

P. Lloyd
P. Lloyd*
Affiliation:
National Gas Turbine Establishment
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Extract

Although a great deal has been said and written in the past eight years or so about engine noise, previous discussion has been very largely concerned with the physical aspects of jet noise and with the possibility of suppressing it by means of special propelling nozzles and ground mufflers. There is however another, and in general a better, way of dealing with jet noise, namely by using engines of low specific thrust, i.e. of low exhaust velocity and one purpose of the paper is to examine the possibilities of such engines. This leads to a consideration of blade noise from fans and turbines for as jet noise is reduced this tends to become the dominant factor. But first of all it is necessary to re-examine the nature of the noise problem.

Type
Research Article
Information
The Aeronautical Journal , Volume 63 , Issue 585 , September 1959 , pp. 541 - 548
Copyright
Copyright © Royal Aeronautical Society 1959

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Footnotes

*

A lecture given to the Society on 27th January 1959.

References

1.Beranek, L. (1959). Report to the Port of New York Authority on the Noise of the Boeing 707/120 airliner. 1959.Google Scholar
2.Peistrup, C. F. and Wesler, J. E. (1953). Noise of Ventilating Fans. Journal of the Acoustical Society of America 25, p. 322. 1953.Google Scholar
3.Brown, D. L. (1959). The Origin of the By-pass and Ducted Fan. The Aeroplane. 13th March 1959Google Scholar
4.Pearson, H. and Fitzgerald, R. M. (1958). Some con siderations Affecting the Design of Engines for Short-to- Medium Range Airliners. 3rd European Aeronautical Congress, 1958.Google Scholar