Investigation of the noise levels produced by electric Boundary Layer Ingesting fans in aircraft

The presentation covers the fundamental physics of noise generation, propagation, and perception in electric Boundary Layer Ingesting (BLI) ducted fans, using measurement data from a national wind tunnel aeroacoustics facility in Bristol. It introduces a source decomposition method to analyse noise origins and interactions, essential for developing quieter airframe-integrated (or embedded) propulsion systems in future-generation aircraft.

Feroz Ahmed, Senior Aeroacoustics Research Engineer, The University of Bristol