Contribution
Cabin acoustics in preliminary aircraft design with propulsion pressure field excitation
* Presenting author
Abstract:
The development of future-proof aircraft necessitates a holistic approach to design, integrating various disciplines such as aerodynamics, acoustics, flight physics, structural mechanics and thermodynamics, from the preliminary design stage. This integrated approach facilitates the development of aircraft that are not only more cost-effective but also more environmentally friendly. As noise is not only a source of discomfort but can also have a detrimental effect on health, the mitigation of cabin noise is of high importance to ensure the acceptance of novel technologies by passengers and cabin crew. This study uses a new numerical simulation approach enabling an early analysis of cabin acoustics for an aircraft with five distributed pull propellers on each side, using a preliminary design of the geometry and an estimate of the pressure field. For the excitation a simplified calculation of the pressure distribution on the skin was achieved by using an advanced analytical bulk model of the propeller sources in combination with a fast multipole acoustic BEM solver. On the vibroacoustic side the symmetries of the reduced cabin geometry were exploited so that only half of the aircraft needs to be calculated. The overall objective is to investigate the influence of the propellers on cabin acoustics.