A6. Exhaust System Combined Pressure Wave - Normal Modes - Analysis

Goal:
Identification of the noise reduction exhaust system structure considering also pressure waves
Method:
  • 1D gasdynamics model of exhaust system
  • 3D CFD of wave reduction structures
  • CAD of exhaust system
  • FEA – Normal modes analysis
Results:
  • An exhaust system structure with 10 % reduced wave amplitudes
  • A normal frequency shift 30% away from nominal engine speed