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Noise Measurements on Cold Jets using Convergent-Divergent Nozzles

Published online by Cambridge University Press:  07 June 2016

R. E. Franklin
R. E. Franklin*
Affiliation:
Department of Aeronautical Engineering, University of Southampton
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Summary:

Tests have been carried out on a series of convergent-divergent nozzles and the results compared with those from a test on a convergent nozzle. At the design pressure ratio, reductions in the noise were found, particularly at 90° to the jet direction. For lower forward pressures the noise is also less, but above the design pressure the noise rises rapidly to the same level as that with a convergent nozzle. In the experiments cold jets were used, but the results are probably applicable in certain respects to hot jets.

Information

Type
Research Article
Information
Aeronautical Quarterly , Volume 8 , Issue 4 , November 1957 , pp. 346 - 359
Copyright
Copyright © Royal Aeronautical Society. 1957

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References

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