Computational Prediction of Flow-Generated Sound

This article provides a critical review of computational techniques for flow-noise prediction and the underlying theories. Hybrid approaches, in which the turbulent noise source field is computed and/or modeled separately from the far-field calculation, are afforded particular attention. Numerical methods and modern flow simulation techniques are discussed in terms of their suitability and accuracy for flownoise calculations. Other topics highlighted include some important formulation and computational issues in the application of aeroacoustic theories, generalized acoustic analogies with better accounts of flow-sound interaction, and recent computational investigations of noise-control strategies. The review ends with an analysis of major challenges and key areas for improvement in order to advance the state of the art of computational aeroacoustics. 483 A nn u. R ev . F lu id M ec h. 2 00 6. 38 :4 83 -5 12 . D ow nl oa de d fr om a rj ou rn al s. an nu al re vi ew s. or g by U N IV E R SI T Y O F IL L IN O IS o n 09 /0 7/ 06 . F or p er so na l u se o nl y. AR266-FL38-18 ARI 11 November 2005 19:14