Skip to content

Tonal and Broadband Noise Calculations for Aeroacoustic Optimization of a Pusher Propeller

by Antonio Pagano, Mattia Barbarino, Damiano Casalino, Luigi Federico
Journal of Aircraft ()
Get full text at journal


A multidisciplinary analysis and optimization is carried out for a propeller in a real pusher aircraft configuration with the goal of reducing the radiated noise power levels, while preserving the aerodynamic efficiency. The optimization process involves the shape of the blade and the position of the engine exhaust ducts. A coupling of the unsteady aerodynamic and structural-dynamic blade models provides the aeroelastic propeller model that drives a tonal and broadband aeroacoustic prediction. The tonal noise results from the periodic flow unsteadiness due to the nonaxial flight and to the impingement of the engine exhausts on the propeller disk. The broadband noise is mainly due to the interaction between the blade leading edge and the exhaust turbulence. It is shown that the tonal noise overwhelms thebroadband noiseandthat the optimization affects the shape of the blade at the tipandin the spanwise segment hit by the exhausts. An overall sound pressure level reduction of 3.5 dB is achieved at the takeoff condition, while preserving the design propeller thrust and resulting in a small penalty on the propeller efficiency in cruise.

Cite this document (BETA)

Readership Statistics

32 Readers on Mendeley
by Discipline
94% Engineering
3% Arts and Humanities
3% Computer Science
by Academic Status
34% Student > Ph. D. Student
28% Researcher
13% Student > Master
by Country
6% United Kingdom
3% Israel
3% France

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Sign up & Download

Already have an account? Sign in