The Generation and Radiation of Supersonic Jet Noise. Volume IV. Theory of Turbulence Generated Jet Noise, Noise Radiation from Upstream Sources, and Combustion Noise PDF Download
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Author: Geoffrey M. Lilley Publisher: ISBN: Category : Languages : en Pages : 189
Book Description
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).
Author: Geoffrey M. Lilley Publisher: ISBN: Category : Languages : en Pages : 189
Book Description
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).
Author: Geoffrey M. Lilley Publisher: ISBN: Category : Jet planes Languages : en Pages : 0
Book Description
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).
Author: Publisher: ISBN: Category : Languages : en Pages : 47
Book Description
This is a summary report of the results of a 13-month research program on the generation and reduction of supersonic jet noise. This program was planned as the first phase of a four-phase effort. Tasks compromising this Phase 1 program were as follows: reviews and evaluation of existing theoretical models for supersonic jet noise generation and radiation; development of the framework of a new, unified theory of aerodynamic noise; development of a new theoretical model of turbulent mixing region noise; development of a new theoretical model for calculating propagation and radiation of upstream noise; a preliminary review of combustion noise; tests on turbulent mixing region noise and shock-associated noise; review of the problems of jet flow measurement and analysis; development of new instrumentation for jet flow measurement; establishment of full facilities for the total program; formulation of the program for future studies.
Author: Geoffrey M. Lilley
Author: Geoffrey M. Lilley
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Author: Geoffrey M. Lilley
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Author: Lockheed-Georgia Company
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