Large-Eddy Simulation for Acoustics

Front Cover
Claus Wagner, Thomas Hüttl, Pierre Sagaut
Cambridge University Press, Jan 15, 2007 - Technology & Engineering
Noise pollution around airports, trains, and industries increasingly attracts environmental concern and regulation. Designers and researchers have intensified the use of large-eddy simulation (LES) for noise reduced industrial design and acoustical research. This 2007 book, written by 30 experts, presents the theoretical background of acoustics and of LES, followed by details about numerical methods, e.g. discretization schemes, boundary conditions, coupling aspects. Industrially relevant, hybrid RANS/LES techniques for acoustic source predictions are presented in detail. Many applications are featured ranging from simple geometries for mixing layers and jet flows to complex wing and car geometries. Selected applications include scientific investigations at industrial and university research institutions.
 

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Contents

Figure 14 Sketch of the insulator of a highspeed
22
Aeroacoustics
24
Figure 22 Sketch of scattered plane wave with mean flow
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Figure 24 Straight duct of arbitrary cross section
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Figure 29 Acoustic flow at a pipe outlet a for
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LargeEddy Simulation
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Figure 31 Schematic kinetic energy spectra
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Figure 34 Schematic of the twolevel filtering procedure and the
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Use of Hybrid RANSLES for Acoustic
128
Figure 411 Instantaneous Schlierenlike view Taken from
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Figure 56 Von Karman vortex street past an inclined wing
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Simulation
206
o
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Figure 514 Transfer function F as a function of
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6
238
Conclusions
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