کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
753671 | 895564 | 2010 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Computational bluff body aerodynamic noise prediction using a statistical approach Computational bluff body aerodynamic noise prediction using a statistical approach](/preview/png/753671.png)
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.
Journal: Applied Acoustics - Volume 71, Issue 12, December 2010, Pages 1194–1203