Aeroacoustic Analysis of Propeller-Fuselage Interaction

The problem addressed in this work consists of prediction of the acoustic field generated by the aerodynamic interaction between propeller and fuselage of a general aviation aircraft. We focus on the analysis of the acoustic field generate by a propeller-fuselage configuration (no wing), where the wake of the propeller remains separated from the surface of the fuselage. Three differen methodologies are applied. The first is based on the potential function and consists in a unified approach for aerodynamic and aeroacoustic analysis. The second is a Kirchhoff approach applied to the fuselage surface in order to determine the scattered pressure in the field once the pressure on the propeller is known. The third is the integration of the FWH equation which determines the pressure field once the pressure on both propeller and fuselage is given. Numerical results are shown for a simple, but realistic, configuration, with the analysis of fuselage effects and the comparison among the considered formulations.