Computational bluff body aerodynamic noise prediction using a statistical approach
Date
2010
Authors
Doolan, C.
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Journal article
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Applied Acoustics, 2010; 71(12):1194-1203
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Con J. Doolan
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Abstract
A new method for calculating the aerodynamic noise generated by bluff bodies is presented in this paper. The methodology uses two-dimensional, unsteady Reynolds averaged Navier Stokes turbulent flow simulations to calculate the acoustic source terms. To account for turbulent flow effects that are not resolved by the flow simulation, a statistical approach has been developed and applied to introduce narrow band random noise. Spanwise de-correlation of flow information is accounted for using a correction method based on a de-correlation length scale. Curle's compact acoustic analogy is used to calculate the far-field noise. To illustrate the effectiveness of the method, the turbulent flow and noise about two test cases are calculated and compared with experimental results from the literature. © 2010 Elsevier Ltd. All rights reserved.
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Copyright 2010 Elsevier Ltd. All rights reserved.