Aeroacoustics Assessment of an Hybrid Aircraft Configuration with Rear-Mounted Boundary Layer Ingested Engine

Hybrid electric propulsion is a promising solution to reduce aircraft emissions, thus improving the sustainability of air transport. In this work, hybrid configuration with rear-mounted boundary layer ingestion (BLI) engine has been investigated. The partial embedding into fuselage generates distortion ingested inflow causing additional tonal and broadband BLI noise sources, and, at same time, alters existing one, such as rotor–stator interaction (RSI). This work focused on RSI modeling, without generated by BLI, far-field propagation including acoustic masking contribution due engine–fuselage integration. As main result, shows contributions engine–aircraft integration noise. Both effects should be properly taken account in early design stage for an effective reduction even ground level.