Aeroacoustics is a branch of acoustics that studies noise generation via either turbulent fluid motion or aerodynamic forces interacting with surfaces. Noise generation can also be associated with periodically varying flows. Although no complete scientific theory of the generation of noise by aerodynamic flows has been established, most practical aeroacoustic analysis relies upon the so-called Acoustic Analogy, whereby the governing equations of motion of the fluid are coerced into a form reminiscent of the wave equation of "classical" (i.e. linear) acoustics. The most common and a widely-used of the latter is Lighthill's aeroacoustic analogy. It was proposed by James Lighthill in the 1950s when noise generation associated with the jet engine was beginning to be placed under scientific scrutiny. Computational Aeroacoustics (CAA) is the application of numerical methods and computers to find approximate solutions of the governing equations for specific (and likely complicated) aeroacoustic problems
2007-02-08 18:55:55
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answer #1
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answered by elvisjohn 7
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1. aeroacoustics (′er·Å·É′küs·tiks)
(acoustics) The science of aerodynamically generated sounds, encompassing the study of how such sounds are produced, how they propagate through various media (including propagation through ducts carrying fluid flows), how they interact with obstacles or barriers or wave-bearing surfaces, how they radiate away, how they can be managed or controlled, and how they are measured or predicted.
2. Aeroacoustics
Aeroacoustics is a branch of acoustics that studies noise generation via either turbulent fluid motion or by aerodynamic forces interacting with surfaces. Noise generation can also be associated with periodically varying flows. Although no complete rational scientific theory of the generation of noise by aerodynamic flows has yet prevailed, most practical aeroacoustic analyses rely upon the so-called Acoustic analogy whereby the governing equations of fluid dynamics are combined with the wave equation of classical acoustics. Although various such analogies currently exist, by far the most common and widely used is Lighthill's aeroacoustic analogy, first proposed by James Lighthill in the 1950s when noise generation associated with the jet engine was beginning to be placed under scientific scrutiny. Computational Aeroacoustics (CAA) is the application of computers to solve numerically aeroacoustics problems.
2007-02-08 23:25:51
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answer #2
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answered by s_d_sondhi 2
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acoustics deals with sounds , so aeroacoustics is a science of sounds dealing with the sounds in the air
2007-02-09 00:30:42
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answer #3
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answered by Anonymous
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