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Actran AeroAcoustics Predicting the noise generated by complex flows Actran AeroAcoustics is a finite element based acoustic solver for predicting the noise generated by turbulent flows. Actran AeroAcoustics recovers aerodynamic noise sources from flow simulations performed with commercial CFD codes such as Fluent™, Star-CD™, StarCCM+™ or Powerflow™. The complete simulation procedure involves three steps: An unsteady flow simulation is performed by the CFD code. At each time step, the CFD solution (velocity, density and pressure fields) is stored in its own native format or in the Ensight™ format. Actran AeroAcoustics computes the aero-acoustic noise sources from the CFD results produced in step 1. This involves translating results from the time to the frequency domain and interpolating them from the CFD to the acoustic mesh. Maps of the aero-acoustic sources produced at this stage are in themselves useful results which can be used to identify the most effective sources. The radiated acoustic field radiated is then computed. This produces a wide set of relevant results: acoustic pressure, velocity or intensity maps, frequency response functions of various local (pressure) or global (power) quantities. This multi-step strategy offers several advantages: (1) Each part of the work can be done independently by different engineers, departments or even companies with different responsibilities or skills. (2) A single CFD simulation can feed different acoustic simulations (e.g. with different acoustic treatments). (3) The acoustic mesh does not need to be refined where the aerodynamic structures are small (for instance in the boundary layers). Actran AeroAcoustics offers high performance solvers and parallel processing features and is fully integrated in Actran VI. Actran AeroAcoustics can be combined with Actran VibroAcoustics in order to address aero-vibro-acoustic challenges. Target applications: Air conditioning modules (HVAC). Side mirror noise. Airframe noise (landing gear, trailing edge). Air distribution systems.

Technical Engine 2.800 cc 4 cyl. turbo diesel 177 HP Manual gearbox 6 gears 4x4 ABS Fuel capacity 80 L Tropical specifications Interior Fabric seats 7 places Airbags front Central door lock with remote control Manual air-conditioner Radio CD USB Bluetooth Multifunctional steering wheel 6 Speakers Power windows Power mirrors Rear camera Exterior 4 Side doors Tires 265/65 R17 Alloy rims 17’’ Spare wheel Fog lights Side steps Roof rails + spoiler Dimensions Length :4.795 mm Dimensions Width :1.855 mm Dimensions Height :1.835 mm

Technical Engine 4.500 cc V8 turbo diesel 232 HP Automatic gearbox 6 gears 4x4 ABS Start/stop button Fuel capacity 93 + 45 L Tropical specifications Interior Fabric seats 8 places Double airbag front Automatic air-conditioner Central door lock Radio CD AUX Bluetooth 6 Speakers Cool box Multifunctional steering wheel Power windows Exterior 4 Side doors Tires 285/65 R17 Steel rims 17’’ Spare wheel Dimensions Length:5.095 Dimensions width:1.980 Dimensions height:1.890 mm Dimensions Weight:4.200 KG