Technology Transfer

Aero-Acoustic/Performance Optimisation of 3D Propellers and Rotors

Applications

Active Blade Rotor
  Airplane Propeller

 > Aeronautics

• Design of optimised aircraft propellers and rotors- noise reduction/performance.

Keywords

• Noise reduction, Performance, Multidisciplinary optimisation, Rotorcraft, Helicopter, Tilt-rotor, UAV, Rotor, Propeller.

Advantages

• Accurate numerical prediction of performance and of noise generated by rotors and propellers. Acoustic codes coupled with aerodynamic codes (CFD or other methods) for optimised performance.
• Design, manufacture and wind-tunnel tests of instrumented propeller or rotor models.

Testing

• Validation of concepts and quantification of design improvements using wind-tunnel tests (including acoustic measurements).
• Influence of new 3D designs and innovative devices on dynamics (e.g. blade deformations), aerodynamics (e.g. blade loads and wakes) and their consequences on acoustics, can be analysed using a comprehensive understanding of physical phenomena involved.

Simulation

• Computation of noise emitted by rotating wings and their performance.
• Detailed analysis of resulting noise emissions.

Expertise

• Proposal of new designs with analysis of parameters influence.
• Expertise on both passive and active concepts including numerical design, model manufacture and wind tunnel tests.
• Design of new rotary concepts using efficient noise prediction codes.
  
  

ERATO rotor (Ø 2 meters) -3.5 to -7 dBA noise. [Cooperation with DLR]

Last Update: 10 October 2006 - © ONERA 2009 - Terms of use