Author: Publisher:
ISBN:
Category : Jet planes
Languages : en
Pages : 194
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: The Generation and Radiation of Supersonic Jet Noise
Author: Geoffrey M. LilleyPublisher:
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).
The Generation and Radiation of Supersonic Jet Noise: Summary of supersonic jet noise studies
Author: Noise Sources in Turbulent Shear Flows: Fundamentals and Applications
Author: Roberto CamussiPublisher: Springer Science & Business Media
ISBN: 3709114586
Category : Technology & Engineering
Languages : en
Pages : 453
Book Description
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.
Technical Information Indexes
Author: United States. Naval Air Systems CommandPublisher:
ISBN:
Category : Aeronautics, Military
Languages : en
Pages : 174
Book Description
NASA Technical Note
Author: Scientific and Technical Aerospace Reports
Author: The Generation and Radiation of Supersonic Jet Noise: Future studies for definition of supersonic jet noise generation and reduction mechanisms
Author: Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods
Author: Steffen MarburgPublisher: Springer Science & Business Media
ISBN: 3540774483
Category : Science
Languages : en
Pages : 584
Book Description
The book provides a survey of numerical methods for acoustics, namely the finite element method (FEM) and the boundary element method (BEM). It is the first book summarizing FEM and BEM (and optimization) for acoustics. The book shows that both methods can be effectively used for many other cases, FEM even for open domains and BEM for closed ones. Emphasis of the book is put on numerical aspects and on treatment of the exterior problem in acoustics, i.e. noise radiation.
Aeroacoustics of Flight Vehicles
Author: Harvey H. HubbardPublisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 616
Book Description