An optimization loop for aero-acoustics fan blade design

Claude Sensiau , Benoit Fayard , Jean-Michel Roux , Maxime Lebrun

In this paper we will discuss an optimization loop used during the fan blade design phase to get a compromise for the efficiency of the fan and broad band interaction noise at different design points. Indeed the aerodynamicians design constraints differ from the acousticians’ ones. To minimize the fuel consumption the fan must be designed for a best efficiency in cruise, but to reach the environmental requirements, the fan blades have to be quiet (and so efficient) during takeoff and landing. In this work, results obtained with an optimization tool will be discussed. The space parameter is defined with design blades parameters such as angle at leading edge, camber, chord, thickness... A special attention will be paid to the efficiency of the fan at high RPM and the interaction broad band noise at off-design points.

Mots clés: Aero-Acoustics; broad band noise; optimization; efficiency

Domaines: Acoustique [physics.class-ph]

Claude Sensiau, Benoit Fayard, Jean-Michel Roux, Maxime Lebrun. An optimization loop for aero-acoustics fan blade design. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811102⟩