MID-FIDELITY FRAMEWORK FOR ROTOR NOISE PREDICTION IN MANEUVERING FLIGHT

The goal of Urban Air Mobility (UAM) is to provide a safe, efficient, and sustainable transportation option to reduce traffic congestion and improve mobility in cities. However, the benefits, such as reduction of pollution and increase of public health, need to face important challenges related to safety, regulatory frameworks and public acceptance; the latter is highly driven by noise emissions. In this paper a mid/low-fidelity framework is used to investigate the effects of the acceleration between two steady conditions at different angular velocities for a small propeller. Far-field noise results are evaluated in terms of physical and psychoacoustic metrics. Differences in amplitude and directivity patterns suggest that in the presence of a fast transient, noise increases. Different angular velocity accelerations have also been investigated, highlighting their impact on noise perception.