Who should attend:

New Actran users. Experience with Actran is not required. Acoustics background is preferable.

 

 

Overview:

In this training you will learn how to use dedicated Actran features for computing the near and the far field noise of a turbomachine. Specific acoustic excitations and non reflecting boundary conditions with duct modes, acoustic liners and handling of the mean flow are topics addressed in this sessions.

Topics covered:

  • Convected acoustic propagations: convected Helmholtz equations (and Discontinuous Galerkin Methods)
  • Non-reflecting boundary conditions: infinite elements, PML, duct modes ( and buffer zones)
  • Excitations: duct modes and Thompson boundary condition
  • Duct modes computation from CFD unsteady results
  • Intake and Exhaust noise
  • Handling of a mean flow computed by an external tool or by the Actran compressible flow solver
  • Use of the adapted numerical method:
    - 2D axisymmetric model
    - 3D half model: automatic symmetric and anti-symmetric computations and recombination
  • Post processing capabilities: acoustic directivities, broadband computations, radiated powers, frequency response functions and maps