In this article, CD adapco have described the type of aeroacoustic analysis possible with their CFD software. Aeroacoustic analysis, or noise prediction, is of primary interest for comfort and safety considerations in many industry sectors, such as, automotive, aerospace, and rail.
STAR-CD offers two methods for the prediction of noise. The first is aimed at capturing broad-band turbulence-based shear noise. The turbulence fields from a steady-state Reynolds Averaged Navier Stokes (RANS) simulation are post-processed to predict the shear-noise distribution in the flow field. This is a new feature in the STAR-CD software.
A second method, used for predicting coherent noise, utilizes the transient flow solver to predict the combined convection and pressure wave effects acting on surfaces. The standard RANS turbulence model and transient flow solver have long been a part of the STAR-CD package.
These two methods allow the CFD engineer to predict both resonant and broad-band based noise in the flow field.
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