The Generation and Radiation of Supersonic Jet Noise
The Generation and Radiation of Supersonic Jet Noise

Author: Geoffrey M. Lilley

Publisher:

Published: 1972

Total Pages: 0

ISBN-13:

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The report presents a series of specific theoretical studies directed toward the solution of jet noise generation and radiation, upstream noise radiation and combustion noise generation. Three theories are presented. Lilley's work is a new theory of jet noise generation, based on identification of acoustic and source generation terms. The acoustic 'converted wave equation' derived includes the Pridmore-Brown/Mungur shear refraction term. Plumblee presents a theoretical analysis and numerical solution techniques for solving for the radiation field from a source within a jet flow and specifically deals with radiation from an acoustic distribution initally specified at the end of a circular exhaust duct termination through the jet flow to the surrounding medium. Finally, Strahle presents a theory on afterburner type combustion noise generation and radiation. Order of magnitude analyses are made in an attempt to estimate acoustic power levels and refraction effects are also investigated. (Author).

The Generation and Radiation of Supersonic Jet Noise. Volume IV. Theory of Turbulence Generated Jet Noise, Noise Radiation from Upstream Sources, and Combustion Noise
The Generation and Radiation of Supersonic Jet Noise. Volume IV. Theory of Turbulence Generated Jet Noise, Noise Radiation from Upstream Sources, and Combustion Noise

Author: Geoffrey M. Lilley

Publisher:

Published: 1972

Total Pages: 189

ISBN-13:

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The report presents a series of specific theoretical studies directed toward the solution of jet noise generation and radiation, upstream noise radiation and combustion noise generation. Three theories are presented. Lilley's work is a new theory of jet noise generation, based on identification of acoustic and source generation terms. The acoustic 'converted wave equation' derived includes the Pridmore-Brown/Mungur shear refraction term. Plumblee presents a theoretical analysis and numerical solution techniques for solving for the radiation field from a source within a jet flow and specifically deals with radiation from an acoustic distribution initally specified at the end of a circular exhaust duct termination through the jet flow to the surrounding medium. Finally, Strahle presents a theory on afterburner type combustion noise generation and radiation. Order of magnitude analyses are made in an attempt to estimate acoustic power levels and refraction effects are also investigated. (Author).

Noise Sources in Turbulent Shear Flows: Fundamentals and Applications
Noise Sources in Turbulent Shear Flows: Fundamentals and Applications

Author: Roberto Camussi

Publisher: Springer Science & Business Media

Published: 2013-02-11

Total Pages: 453

ISBN-13: 3709114586

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The articles in this volume present the state-of-the-art in noise prediction, modeling and measurement. The articles are partially based on class notes provided during the course `Noise sources in turbulent shear flows', given at CISM on April 2011. The first part contains general concepts of aero acoustics, including vortex sound theory and acoustic analogies, in the second part particular emphasis is put into arguments of interest for engineers and relevant for aircraft design: jet noise, airfoil broadband noise, boundary layer noise (including interior noise and its control) and the concept of noise sources, their theoretical modeling and identification in turbulent lows. All these arguments are treated extensively with the inclusion of many practical examples and references to engineering applications.