A contribution to lifting surface aerodynamics based on time domain aeroacoustics

Based on the Ffowcs Williams-Hawkings equation, a boundary integral method is presented for the calculation of the aerodynamic loading on thin lifting surfaces in linearized compressible flow. The final goal is providing aerodynamic inputs to aeroacoustic codes through the same procedure employed for determining the sound field. Several methods proposed over the last few years have been reviewed; then an aerodynamic formula has been chosen, which was derived by Milliken following an acoustic formulation proposed by Farassat. The method has been improved by adding some correcting terms, as a first step to turn the original lifting surface approach into an actual BEM formulation.