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A three dimensional parabolic equation method for sound propagation in moving inhomogeneous media
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10.1121/1.3203934
/content/asa/journal/jasa/126/4/10.1121/1.3203934
http://aip.metastore.ingenta.com/content/asa/journal/jasa/126/4/10.1121/1.3203934
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The discretization strategy.

Image of FIG. 2.
FIG. 2.

The computational domain for the 3D PE calculation.

Image of FIG. 3.
FIG. 3.

Comparison of the real part of acoustic pressure from the analytical solution and the 3D PE numerical solution for the no wind case. The observer is located at and .

Image of FIG. 4.
FIG. 4.

Comparison of SPL at different azimuthal angles for the no wind case from a 3D PE calculation.

Image of FIG. 5.
FIG. 5.

Comparison of the analytical solution and the 3D PE numerical solution for the uniform wind case. The observer is located at and . (a) Real part of the acoustic pressure and (b) SPL.

Image of FIG. 6.
FIG. 6.

Comparison of the analytical solution and the 3D PE numerical solution for the uniform wind case. The observer is located at and . (a) In the upwind direction and (b) in the downwind direction.

Image of FIG. 7.
FIG. 7.

Comparison of numerical errors for the real part of the acoustic pressure with different azimuthal resolution for the uniform wind case.

Image of FIG. 8.
FIG. 8.

Comparison of SPL for different observer azimuthal angles for the logarithmic wind case from the 3D PE calculation. Acoustic source is located at .

Image of FIG. 9.
FIG. 9.

Comparison of SPL for different azimuthal angles for the logarithmic wind case from the 3D PE calculation. Acoustic source is located at .

Image of FIG. 10.
FIG. 10.

SPL comparison of numerical results at and different azimuthal locations, for calculations with the 3D PE and the 2D PE with ESS. A monopole source is located at for a logarithmic wind profile.

Image of FIG. 11.
FIG. 11.

SPL comparison of numerical results at and different azimuthal locations, for calculations with the 3D PE and the 2D PE with ESS. A monopole source is located at for a logarithmic wind profile.

Image of FIG. 12.
FIG. 12.

Wind velocity for the rotating wind case. (a) Velocity direction and (b) velocity magnitude.

Image of FIG. 13.
FIG. 13.

SPL comparison of numerical results using 2D PE with an effective speed of sound approximation and 3D PE for a monopole source located at and different azimuthal locations for the rotating wind case. (a) In the upwind and downwind directions and (b) in the cross wind direction.

Image of FIG. 14.
FIG. 14.

SPL comparison of the numerical results using 2D PE with an effective speed of sound approximation and 3D PE for a monopole source located at at different azimuthal locations for the rotating wind case. (a) In the upwind and downwind directions and (b) in the cross wind direction.

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/content/asa/journal/jasa/126/4/10.1121/1.3203934
2009-10-01
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A three dimensional parabolic equation method for sound propagation in moving inhomogeneous media
http://aip.metastore.ingenta.com/content/asa/journal/jasa/126/4/10.1121/1.3203934
10.1121/1.3203934
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