Noise prediction via large eddy simulation: Application to radial fans

• Autores: Esra Sorguven, Yilmaz Dogan, Faruk Bayraktar, Kenan Y. Sanliturk
• Localización: Noise Control Engineering Journal, ISSN 0736-2501, Vol. 57, Nº. 3, 2009, págs. 169-178
• Idioma: inglés
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• Resumen

  • In this study, aerodynamics and aeroacoustics of two radial fans are investigated by using a hybrid computational aeroacoustics method. Unsteady turbulent flow field of both fans is simulated with large eddy simulation (LES). Acoustic sources are computed based on the pressure fluctuations. Inhomogeneous wave equation, which accounts for the propagation, diffraction and scattering of the acoustic waves, is solved to determine the far field sound pressure level with the boundary element method. Numerical results are validated with experimental data. Sound pressure level distribution in narrow band frequency spectrum and directivity of the acoustic waves are predicted numerically with a high accuracy. Results of the LES provide an insight into the turbulent flow and noise generation mechanisms, which can be utilized to reduce fan noise.