Do your products suffer from flow-induced noise? Are you 
facing severe noise problems due to rotating blowers, fans 
or HVAC systems? Would you like to reduce noise at the 
design stage or quickly model the noise radiated by an 
open sunroof, wing mirrors or A-pillars, in order to 
improve your product quality? 

The aero-acoustics simulation tools from LMS help you 
evaluate the noise from unsteady flow phenomena like 
vortex shedding and turbulent boundary layers by coupling 
Computational Fluid Dynamics (CFD) methods with 
Computational Acoustics. 

The aero-acoustics simulation tools from LMS offer a set 
of capabilities and user-friendly interfaces to transform 
the time-domain CFD data into equivalent aero-acoustics 
sources in the frequency domain. State-of-the-art acoustic 
BEM analyses will then return accurate predictions of the 
noise levels generated by these sources. Interfaces to 
leading CFD codes such as FLUENT, STAR-CD and CFX are 
available.

Aero-Acoustic Modeling

The LMS Aero-Acoustic Modeling solution helps engineers to 
accurately predict and solve aero-acoustic noise problems, 
ranging from fan noise in electrical appliances to 
turbulence-based noise in aircraft. 
Aero-Acoustic Modeling uses a pragmatic approach to 
predict aero-acoustic noise, based on aero-acoustic 
analogies. It derives the equivalent aero-acoustic sources 
starting from the flow equations calculated with ANSYS 
CFX, FLUENT or STAR-CD. It then calculates the resulting 
radiated or scattered noise using BEM (Boundary Element 
Method) technology. 

This efficient and cost-effective solution only requires 
modeling the boundary of the system, resulting in 
relatively small acoustic models that are easy to create, 
handle and check, yet providing accurate solutions to real-
life problems. Powerful post-processing tools enable 
engineers to analyze and visualize the results for 
acoustic refinement.