Computational Prediction of Flow-Generated Sound

http://www.cadfamily.com/a/CAE_FEA_CFD/Fluid-Mechanics/Computational-Prediction-of-Flow-Generated-Sound_4184.html

Key Words
aeroacoustics, flow noise, computational methods, acoustic
analogy, turbulence simulation, noise control
Abstract
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.