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Development of Computational Fluid/Aeroacoustic Coupling Code

Article of Honda R&D Technical Review Vol.16 No.2


A rather novel coupling method is developed for predictions of aerodynamic sound fields. The flow fields are predicted by Reynolds Averaged Navier-Stokes (RANS) and the sound propagations are computed by Linearized Euler Equations (LEE). This method enables wide range aeroacoustic analyses with the lower computational cost. All simulations are performed using unstructured grid methods because of their flexibility to fit complex geometries. To validate this method in the present work computational aeroacoustic analysis around an airfoil was carried out. Sound sources are treated universally by using turbulent vortex fluctuations which induce aeroacoustic phenomena, not by the secondary pressure fluctuations on the body surfaces. This suggests a new guidance in computational aeroacoustics.


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Author (organization or company)

Toshihiro KAMATSUCHI(Wako Research Center)

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