Mechanism Of Noise Generation In The Turbulent Boundary Layer
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| Author | : John Laufer |
| Publisher | : |
| Total Pages | : 100 |
| Release | : 1964 |
| Genre | : Boundary layer noise |
| ISBN | : |
The first chapter briefly states the problem and gives its historical development; the second reviews some basic notions of classical acoustics with special emphasis on the sound field produced by elementary sound sources, while the third one contains the generalized wave equation governing the pressure field radiated by nonuniform nonstationary flow. Subsequent chapters describe the methods proposed by the various authors for finding a solution to the radiation problem. The experimental approach is discussed. (Author).
| Author | : |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 1964 |
| Genre | : |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 127 |
| Release | : 1819 |
| Genre | : |
| ISBN | : |
| Author | : Christophe Brun |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 344 |
| Release | : 2009-03-07 |
| Genre | : Technology & Engineering |
| ISBN | : 3540899561 |
Large Eddy Simulation (LES) is a high-fidelity approach to the numerical simulation of turbulent flows. Recent developments have shown LES to be able to predict aerodynamic noise generation and propagation as well as the turbulent flow, by means of either a hybrid or a direct approach. This book is based on the results of two French/German research groups working on LES simulations in complex geometries and noise generation in turbulent flows. The results provide insights into modern prediction approaches for turbulent flows and noise generation mechanisms as well as their use for novel noise reduction concepts.
| Author | : M. O. Varner |
| Publisher | : |
| Total Pages | : 44 |
| Release | : 1975 |
| Genre | : Boundary layer noise |
| ISBN | : |
In an attempt to determine the parameters characterizing the noise environment in transonic tunnels, noise-generating mechanisms for porous-wall tunnels with 60-deg inclined holes were isolated and studied. The noise environment in the test section is separated into three distinct parts: the noise due to jet flow through the porous walls, a wall hole-tunnel resonance phenomena, and the turbulent boundary layer on the test section walls and in the diffuser. Each part is analyzed separately for the effects of aerodynamic and geometric flow constraints on the frequency and power characteristics. The contribution of each of the acoustic models to the test section free-stream fluctuating pressure level is also examined.
| Author | : Di Zhou |
| Publisher | : |
| Total Pages | : 109 |
| Release | : 2021 |
| Genre | : |
| ISBN | : |
| Author | : Roberto Camussi |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 453 |
| Release | : 2013-02-11 |
| Genre | : Technology & Engineering |
| ISBN | : 3709114586 |
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.
| Author | : W. C. Sperry |
| Publisher | : |
| Total Pages | : 150 |
| Release | : 1961 |
| Genre | : Noise |
| ISBN | : |
| Author | : Con Doolan |
| Publisher | : Springer Nature |
| Total Pages | : 193 |
| Release | : 2022-05-10 |
| Genre | : Science |
| ISBN | : 9811924848 |
This book highlights the importance of sound produced by fluid flow or flow-induced noise. Noise created by unsteady flow creates high levels of environmental noise pollution, a known public health problem, and can compromise the acoustic qualities of marine vessels. There is a seemingly ever-growing list of modern technology that created flow-induced noise which includes aircraft, wind turbines, submarines, drones, high-speed rail, and cooling fans. More scientists and engineers are required to incorporate the effects of flow-induced noise in their work. This book also provides a comprehensive introduction to the theory underpinning the understanding of flow-induced noise.
| Author | : Laura Botero Bolívar |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2024 |
| Genre | : |
| ISBN | : 9789036559898 |
