FINETM/Acoustics is a fully CFD Integrated environment dedicated to Aero-Vibro-Acoustic simulations. It provides the capabilities to solve a wide range of aeroacoustic and fully coupled vibro-acoustic problems, from simple pre-design calculations to detailed large scale analyses of complex systems.
Applications
Aero-acoustics and Acoustics: aeronautical turbofan engines & nacelles, propellers, contra rotating open rotors (CROR), compressors, turbines, airframe noise, airfoil noise, helicopter's rotor noise, wind turbines, HVAC systems, flow ducts, automotive mufflers and exhausts, marine propellers, etc.
Vibro-acoustics: vibrating structures, NVH, water pumps, marine applications, panel TL, engine radiation, random vibro-acoustics, acoustic fatigue, etc.
Graphical user interface
The GUI enables powerful control of all the modeling steps, from the initial pre-processing, to the solvers' execution, up to the final post-processing and analysis of results.
Pre-processing
Direct import of the CFD mesh and advanced projection of the CFD results onto the acoustic mesh.
Import of structural meshes and results (for vibro-acoustics).
Import of acoustic meshes generated by HEXPRESSTM/Hybrid, the NUMECA-integrated CAD cleaning and parallel grid generation system creating conformal body-fitted meshes on complex arbitrary geometry.
Acoustic mesh generation from coarsening or shrink-wrapping of the imported CFD and structural meshes.
Large set of acoustic boundary conditions and equivalent acoustic sources.
Easy application of boundary conditions and flexible definition of multiple-domains.
Solvers
FlowNoise (DSNG) solver for the prediction of BROADBAND noise produced by "isotropic" turbulence, relying on a cost-effective CFD RANS analysis.
Frequency Response solver (coupled FEM/BEM), modeling the sound propagation in presence of non-uniform mean flow.
Strong integration within the FINETM/Turbo Non Linear Harmonic (NLH) CFD method, specifically suited to compute TONAL noise.
Ffowcs-Williams & Hawkings (FW-H) solver, implementing the acoustic analogy to model noise radiated by fixed/rotating, solid/permeable surfaces.
Eigenvalues (FEM) to evaluate natural acoustic modes (cavity modes), coupled vibro-acoustic modes and modal damping with sound absorption material.
Solvers implementation
A single integrated solver (coupled BEM-FEM).
Parallelization of all stages (coefficient calculations, system solution, microphones evaluation).
Iterative and Direct solvers available.
Cluster solver availability: Windows, Linux (MPI Based).
Post processing
Flexible visualization and manipulation of results.
2D plots (e.g. spectra or time histories at virtual microphones and nodes).
Average evaluator to extract sound power, impedance, intensity, etc. on groups of elements.
Representation in linear frequencies and 1/3 octave bands.
A-weighing, C-weighing (correction for hearing sensitivity).
Automatic calculation of Transmission Loss (e.g. in mufflers).
3D view of computed acoustic fields and distributions.
Animation of complex fields (fringe plots).
Audio reproduction of sound at microphones.
Recursive execution through batch files (ASCII).
Export of solutions (plots, fields) in proprietary and ASCII file formats.
