FWH Solver
Aeroacoustics sources with the FWH equation.
VNoise main page
Additional Modules
FWH Solver: Aeroacoustic of blades and fans.
Flow-Noise: Flow generated noise.
VNoiseCluster: Parallel calculations.

The FWH Solver is a VNoise module that permit to consider aero-acoustic sources in VNoise analyses. Typical applications include:

  • Sound radiated by blades, fans, rotors.
  • Sound generated by unsteady pressure fluctuations on solid surfaces
  • Sound radiated by turbulence.
The FWH Solver is based on an advanced integration technique of the Ffowcs Williams Hawkings equation. Typically the FWH solver require some aerodynamic data computed by a CFD code, and that characterize the aero-acoustic source.
The FWH Solver then permit to integrate the FWH equation over a suitable surface that enclose the source. Both permeable and non permeable surfaces are available enabling a more easy choice of the integration surface, and a more easy coupling with CFD codes.

 Typical example of the integration surface are:
  • Surface of rotating blades and fans.
  • Physical surfaces on which aerodynamic loads are applied.
  • Fictitious surfaces that enclose an aeroacoustic source.

Both fixed and rotating integration surfaces can be used. The results provided by the FWH Solver are the acoustic pressures generated by the aerodynamic sound in any desired microphone position.

FWH Solver is a component of the VNoise integrated aeroacoustic suite, and when coupled with the FlowNoise module and the FEM/BEM solver constitute a powerful tool that can be applied in a wide range of physical applications.