Journal ArticleDOI
Conventional profile coaxial jet noise prediction
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A semi-empirical model for predicting the noise generated by conventional velocity-profile jets exhausting from coaxial nozzles is presented and compared with small-scale static data as discussed by the authors.Abstract:
A semiempirical model for predicting the noise generated by conventional velocity-profile jets exhausting from coaxial nozzles is presented and compared with small-scale static data. The present method is an updated version of that part of the original NASA Aircraft Noise Prediction Program (1974) relating to coaxial jet noise. The new procedure is more theoretically based and has also been improved by some empirical adjustments.read more
Citations
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Journal ArticleDOI
Aircraft noise prediction
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References
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Proceedings ArticleDOI
Experiments of shock associated noise of supersonic jets
J. M. Seiner,T. D. Norum +1 more
TL;DR: In this paper, the authors examined the aero-acoustics associated with model nozzles operating supersonically and compared the shock structure and radiated shock noise of Mach 1.5 and 2.0 noizles with those of a convergent nozzle over a wide nozzle pressure ratio range corresponding to a fully expanded Mach number between unity and 237.
Journal ArticleDOI
Noise and Flow Characteristics of Coaxial Jets
TL;DR: In this article, the authors examined the noise from cold subsonic coaxial jets issuing from concentric nozzles with external mixing and made an attempt to relate the results to the flow patterns of the jets.
Interim prediction method for jet noise
TL;DR: In this article, a method for predicting jet noise for a wide range of nozzle geometries and operating conditions of interest for aircraft engines is proposed, based on this information a interim method of jet noise prediction is proposed.
Journal ArticleDOI
An improved prediction method for the noise generated in flight by circular jets
TL;DR: In this article, a semi-empirical model for predicting the noise generated by jets exhausting from circular nozzles is presented and compared with small-scale static and simulated flight data.
Proceedings ArticleDOI
Jet noise from coaxial nozzles over a wide range of geometric and flow parameters
W. Olsen,R. Friedman +1 more
TL;DR: In this paper, free field pure jet noise data were taken for a large range of coaxial nozzle configurations and correlation of the data resulted in a simple procedure for estimating ambient temperature subsonic coaxial jet noise spectra over a wide range of geometric and flow parameters.