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A cost-effective solution to noise prediction.
CAA++ is a comprehensive suite of tools for simulating
aero-acoustics problems. Designed to synergistically complement CFD++, CAA++ provides the user with an extended set of analytical and numerical methods to simulate the generation and transmission of sound waves through fluids.
What is CAA++?
CFD++, like many other commercial CFD solvers, allows for direct prediction
of aero-acoustic phenomena using LES or hybrid RANS/LES. However, such methods are
often prohibitively expensive, particularly for near-wall flows, far-field propagation
or scattering of high-frequency acoustic waves.
CAA++ allows you to go beyond these traditional methods with a variety of analytic
tools for far field propagation and more efficient, specialized numerical solvers
for modeling sound generation.
These tools include
- Time- and frequency-domain wave-propagation methods for far-field noise
- Non-Linear Acoustics Solver (NLAS) for more efficient simulations of non-linear, near-field noise sources.
Many of the CAA++ methods are designed to operate on a reduced set of data. For example, by exploiting established mean and statistical data on modest meshes covering small sub-domains, NLAS offers a cost-effective noise prediction approach for boundary-layer or weak-shear problems in which hybrid RANS/LES would only give rise to quasi-steady solutions. The CAA++ suite also includes sub-domain extraction, mapping and re-interpolation tools as well as a wide variety of post processing tools.
(Image courtesy of Metacomp Technologies)
Acoustic radiation + local vorticity-transport. NLAS technique eliminates spurious wave reflections
