Author: Lockheed-Georgia Company
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 156
Book Description
The Generation and Radiation of Supersonic Jet Noise: Progress toward a unified theory of jet engine noise
The Generation and Radiation of Supersonic Jet Noise
Author: Philip Ellis Doak
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 0
Book Description
Existing theories of aerodynamic noise generation are critically reviewed with special emphasis on conceptual adequacy and physical scope with special reference to supersonic jet noise. In this review the basic work of Stokes, Kirchoff and Rayleigh on fluctuating motions in fluids is recalled and developed to provide a firm basis for the critique. The advantages and disadvantages of acoustic analogy theories such as Lighthill's are thoroughly discussed in Section 11.3. A contribution is made towards removing the criticisms made by Lighthill of Ribner's 'isotropic source tensor' theory. New developments such as those by Crow, Lilley and Doak are emphasized. On the basis of the evidence provided by the critical review, a new unified theory for jet noise has been devised. (Author).
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 0
Book Description
Existing theories of aerodynamic noise generation are critically reviewed with special emphasis on conceptual adequacy and physical scope with special reference to supersonic jet noise. In this review the basic work of Stokes, Kirchoff and Rayleigh on fluctuating motions in fluids is recalled and developed to provide a firm basis for the critique. The advantages and disadvantages of acoustic analogy theories such as Lighthill's are thoroughly discussed in Section 11.3. A contribution is made towards removing the criticisms made by Lighthill of Ribner's 'isotropic source tensor' theory. New developments such as those by Crow, Lilley and Doak are emphasized. On the basis of the evidence provided by the critical review, a new unified theory for jet noise has been devised. (Author).
The Generation and Radiation of Supersonic Jet Noise. Volume III. Progress Toward a Unified Theory of Jet Engine Noise
Author: Philip E. Doak
Publisher:
ISBN:
Category :
Languages : en
Pages : 151
Book Description
Existing theories of aerodynamic noise generation are critically reviewed with special emphasis on conceptual adequacy and physical scope with special reference to supersonic jet noise. In this review the basic work of Stokes, Kirchoff and Rayleigh on fluctuating motions in fluids is recalled and developed to provide a firm basis for the critique. The advantages and disadvantages of acoustic analogy theories such as Lighthill's are thoroughly discussed in Section 11.3. A contribution is made towards removing the criticisms made by Lighthill of Ribner's 'isotropic source tensor' theory. New developments such as those by Crow, Lilley and Doak are emphasized. On the basis of the evidence provided by the critical review, a new unified theory for jet noise has been devised. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 151
Book Description
Existing theories of aerodynamic noise generation are critically reviewed with special emphasis on conceptual adequacy and physical scope with special reference to supersonic jet noise. In this review the basic work of Stokes, Kirchoff and Rayleigh on fluctuating motions in fluids is recalled and developed to provide a firm basis for the critique. The advantages and disadvantages of acoustic analogy theories such as Lighthill's are thoroughly discussed in Section 11.3. A contribution is made towards removing the criticisms made by Lighthill of Ribner's 'isotropic source tensor' theory. New developments such as those by Crow, Lilley and Doak are emphasized. On the basis of the evidence provided by the critical review, a new unified theory for jet noise has been devised. (Author).
The Generation and Radiation of Supersonic Jet Noise: Future studies for definition of supersonic jet noise generation and reduction mechanisms
Author:
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 52
Book Description
The Generation and Radiation of Supersonic Jet Noise: Summary of supersonic jet noise studies
Author:
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 50
Book Description
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 50
Book Description
The Generation and Radiation of Supersonic Jet Noise: Append. 2. Shock associated noise data
Author:
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 694
Book Description
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 694
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994
Book Description
The Generation and Radiation of Supersonic Jet Noise: Theory of turbulence generated jet noise, noise radiation from upstream sources, and combustion noise
Author:
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 194
Book Description
Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 194
Book Description
NASA Technical Note
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 740
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 740
Book Description
The Generation and Radiation of Supersonic Jet Noise
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).
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).