Numerical computation of sound propagation over a noise screen based on an analytic approximation of the wind speed field

The effect of wind on the performance of a noise screen is studied. Based on wind tunnel experiments and numerical computations of flow over an obstacle, an analytic approximation of the wind speed field near a noise screen is developed. The wind speed field is used for numerical computations of dow...

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Bibliographic Details
Published in:Applied acoustics 2000-07, Vol.60 (3), p.327-341
Main Authors: Salomons, Erik M., Rasmussen, Karsten B.
Format: Article
Language:English
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Summary:The effect of wind on the performance of a noise screen is studied. Based on wind tunnel experiments and numerical computations of flow over an obstacle, an analytic approximation of the wind speed field near a noise screen is developed. The wind speed field is used for numerical computations of downwind sound propagation over a screen, performed with the parabolic equation method. For various source–screen–receiver configurations, it is found that the effect of wind on the performance of a screen is large. Further, it is found that the effect of screen-induced wind speed gradients cannot be ignored, in many situations.
ISSN:0003-682X
1872-910X
DOI:10.1016/S0003-682X(99)00052-3