Technology Transfer

Prediction and Reduction of Rotor and Propeller Noise Pollution

Applications

 > Aeronautics

• Prediction of rotorcraft and propeller noise generation. Noise propagation taking into account influence of terrain.
• Low noise flight procedures proposed.

 > Energy Production

• Prediction of windmill noise generation. Noise propagation taking into account effect of topography and effect of wind.

 > Environment

• Advice on land use planning to minimise impact of wind-mills, helicopters and/or propellers on populations.

Keywords

• Noise, Noise reduction, Rotorcraft, Windmill, Propellers, Heliport, Land use planning.

Advantages

• Measurement and analysis of noise pollution.
• Prediction of noise pollution taking into account topography of terrain (shielding effects, reflections …) The real 3D effect of the terrain is restored by the computation method.
• Acoustic codes directly coupled with aerodynamic codes (CFD or other methods).

Testing

• Testing

  • Noise measured and analysed by deploying an array of microphones and the corresponding recording device in the disturbed area.

• Simulation

  • Simulation of noise produced by rotating devices. Integration of topography in the computation to assess the real noise impact on populations.

• Expertise

  • Low noise flight procedures proposed.
• Advice for land use planning for heliport, airport or windmill facility installation in order to maximize shielding effect of the terrain or to find a less disturbing flight path.

Customers

• Airbus, Eurocopter

 

Computation of helicopter noise behind a hill
[determination of the hill shielding effect on noise]

Last Update: 3 October 2006 - © ONERA 2009 - Terms of use