Computational Aero-Acoustics

Computational aero-acoustics (CAA) allows the prediction and comparison of the aero-acoustic performance of designs. ICON has a long experience in performing and validating flow induced noise computations.

In our first studies, numerical techniques developed in the DESTINY-AAC (Detached Eddy Simulation for the Transportation INdustrY – AeroACoustics) industrial project with partners Audi, Bombardier, DaimlerChrysler, Behr etc. were broadly applied. Technology evaluation for wide variety of applications including HVAC systems, A-pillars, wing-mirrors, fans, cavities etc. has been achieved.
A2 Side Mirrow Flowfield
Aero Acoustics
A2 Side Mirrow Flowfield
Aero Acoustics
A2 Side Mirrow Flowfield


More recently, ICON has provided benchmark assessments of current capabilities of CFD and acoustic simulation tools for simulating aero-acoustic phenomena. Various numerical methods have been evaluated including LES, DES, RANS. Software tools that have been evaluated and compared include STAR-CD, OpenFOAM® and PowerFLOW. Noise propagation to the near and far field is realised through coupling of CFD tools with other commercial tools (SysNOISE, ACTRAN etc)

In-house aero-acoustics areas of current research include wing-mirrors, cavities, A-pillars, gutters, cabin air outlets, high-lift devices, HVAC ducting.

The following questions are among those that the company would commonly respond to:
  • What are the most important sources of noise to consider in our application?
  • What are the strengths and weaknesses of the available numerical prediction methods?
  • What are the most suitable noise prediction technologies to introduce into the Virtual Product Development (VPD) process?
  • What hardware and software investment would be required to predict the aero-acoustic sound sources and propagation?
ICON provides a bespoke simulation methodology based on both numerical and experimental experience.
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