This simulation demonstrates the capabilities of our aeroacoustics solver in the context of external aerodynamics using a high-speed TGV Duplex train. We simulate both aerodynamic flow and acoustic wave propagation to analyze surface pressure and noise radiation across the train’s body.

Pressure fluctuation on the train surface (P_AVG-P). Values range from -500Pa to 500 Pa

Simulation Highlights

  • Full 3D simulation of flow and acoustic fields around a high-speed train
  • Visualization of acoustic pressure propagation into the surrounding air
  • Surface pressure fluctuation analysis across critical components

Particular attention is given to:

  • Pantograph Region: A known source of flow-induced noise due to its complex geometry and flow separation behavior.
  • Nose-Windscreen Transition: A sensitive area where sharp changes in surface geometry lead to increased pressure fluctuations and strong acoustic radiation.
  • Bogie and Undercarriage Zone: The region around the wheels and suspension system, also known as the bogie, experiences strong turbulence and is a notable contributor to surface pressure fluctuations and acoustic radiation.
Frequency filtered acoustic pressure (PA_PSD_dB) at 300Hz mapped onto surface. High values indicate increased acoustic radiation. Acoustic pressure levels are averaged in a band of 100Hz, with 300Hz as the centre frequency.
Frequency filtered acoustic pressure (PA_PSD_dB) at 300Hz mapped onto surface. High values indicate increased acoustic radiation. Acoustic pressure levels are averaged in a band of 100Hz, with 300Hz as the centre frequency.

    Engineering Insights

    Understanding the interplay between aerodynamics and acoustic radiation is essential in modern train design. Our simulation reveals key areas of acoustic emission and pressure fluctuation, providing valuable input for improving aerodynamic shaping and noise control strategies.

    This case highlights how our solver supports the design of quieter, more efficient high-speed rail systems by offering precise insight into both flow dynamics and their acoustic consequences.

    To further illustrate the strengths of our simulation capabilities, we provide two visual demonstrations from the high-speed train case:

    • Acoustic Pressure Visualization: This video highlights the propagation and distribution of acoustic pressure across the train’s surface. It reveals key regions of noise radiation and offers valuable insights for targeted noise control.
    • Surface Pressure Fluctuation Visualization: This video shows how surface pressure varies dynamically during high-speed operation. It focuses on turbulent interactions and the intensity of pressure fluctuations in noise-critical regions such as the pantograph, nose-windscreen transition, and bogie area.

    These animations help engineers understand the physical origins of aerodynamic noise and guide design decisions for quieter, more efficient transport systems.

    Acoustic Pressure (PA) mapped onto the train surface. Values range from -50Pa to 50Pa