Aerospace

Free Field Technologies enjoys a close collaboration with many leading aerospace companies and provides dedicated solutions matching this industry's very specific needs.

From the largest commercial jets to small general aviation aircrafts, from military carriers to business jets, for fixed-wing aircrafts or helicopters Actran offers the best available tools and unmatched consulting experience in:

  • fuselage and cockpit insulation assessment and optimization;
  • engine nacelle liner design (intake, bypass and exhaust) including installation effects;
  • helicopter turboshaft engine intake plenum and exhaust liner design (Free Field Technologies is a partner in the Friendcopter European R&D project;
  • ECS (Environmental Control System) noise propagation in air distribution duct;
  • ramp noise (APU and ECS inlet and outlet silencer design, ECS noise transmission through belly fairing);
  • broad-band aero-acoustics (slat/flap noise);
  • acoustic fatigue of payload during space launch phase (sound transmission through fairing).
Nacelle Exhaust
Nacelle Exhaust
Satellite Antenna loaded by a DSF

Among the many unique features developed to serve the aerospace community are:

  • turbulent boundary layer and diffuse sound field mechanical excitation models;
  • convected wave propagation model;
  • support of composite materials;
  • specific fan noise source models;
  • link to all popular CFD codes;
  • support of high-performance computing infrastructures.
Actran evolved significantly over the last decades. It includes a wealth of features that are necessary for modeling accurately our problems in acoustics, vibro-acoustics and aero-acoustics.
Jean-Yves Suratteau, head of the numerical methods group in the Acoustics & Enviromnet department of AIRBUS
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On the effects of vorticity on the acoustic field through a scalar operator based on total enthalpy terms
Vibro-Acoustic Response Prediction of the Bartolomeo Multi-Purpose Payload
A cost-effective computational technique for aeroacoustic noise prediction using the SNGR method
Numerical investigation of indirect combustion noise mechanisms in a nozzle
Validity of the transfer matrix method for modeling trim components in vibro-acoustic applications
Analysis Of IXV Space Hardware Exposed To Acoustic Diffuse Random Field
Optimal Design of the Acoustic Treatments Damping the Noise Radiated by a Turbofan Engine
Robust analysis of the acoustic transmission properties of a structure made of visco-elastic composite material
Efficient Aeroacoustic Simulations of Jet Engine Noise using GPU acceleration
Robust vibro-acoustic analysis in the low and mid-frequency range of spacecraft payloads submitted to diffuse sound field excitation
Third-order acoustic finite elements and H-adaptivity for efficient acoustic simulations
Modeling Liners for Engine Exhaust Applications
Prediction of Transmission Loss Through the Treated Inlet Duct of an Aircraft Auxiliary Power Unit
Turbofan Inlet Distortion Noise Prediction with a Hybrid CFD-CAA Approach
Simulation of Installation Effects of Aircraft Engine Rear Fan Noise with ACTRAN/DGM
Validation of Beamforming Analysis Methodology with Synthesized Acoustic Time History Data: Sub-Scale Fan Rig System.
Integrating CFD source predictions with time-domain CAA for intake fan noise prediction.
New advances in the use of Actran/TM for nacelle simulations
Broadband Turbomachinery Noise: Exhaust Noise Computations with ActranTM and ActranDGM
Optimization of a Seamless Inlet Liner Using an Empirically Validated Prediction Method
Performance improvements and new solution strategies of Actran TM for nacelle simulations
Prediction of vibro-acoustic responses of Ariane 5 vehicle equipment bay due to acoustic noise excitation
Application of Acoustic FEA to the Automotive and Aircraft Industry
Exhaust noise prediction of realistic 3D lined turbofans submitted to strong shear layers
Design sensitivity analysis on low-frequency noise radiation of air supply ducts
Noise transmission characteristics of stiffened/unstiffened cylindrical shells subjected to random excitations at high frequencies computational performances of an extended modal model
Noise reduction of aircraft structures through aerodynamic (Corso model) and acoustic excitation
Performance of a DGM scheme for LEE and applications to aircraft engine exhaust noise
Shear Layer Modelling with a Finite Element Model - Variants of the Munt Problems
Parallel DGM scheme for LEE applied to exhaust and bypass problems
New advances in the use of Actran/TM for nacelle simulations and optimisation of IBM clusters for Actran parallel computations
Efficient Discontinuous Galerkin Methods for solving acoustic problems
Development and validation of a parallel out-of-core propagation and radiation code with validation on a turbofan application
Aeroacoustic Simulation of Double Diaphragm Orifices in an Aircraft Climate Control System
A New CAA Formulation based on Lighthill’s Analogy applied to an Idealized Automotive HVAC Blower using AcuSolve and Actran/LA
Aeroacoustic Simulation of the Noise radiated by an Helmholtz Resonator placed in a Duct
Floor effect on airborne sound transmission through a cylindrical shell
Computational Strategies for Modeling Distributed Random Excitations (Diffuse Field and Turbulent Boundary Layer) in a Vibro-Acoustic Context
An efficient modal framework for dealing with Realistic randomly-excited vibro-acoustic model