AIRCRAFT PROPULSION SYSTEM WITH A BOUNDARY LAYER INGESTION FAN SYSTEM AND METHOD

摘要

An aircraft propulsion system includes a boundary layer ingestion (BLI) fansystemdisposed at an aft end of an aircraft. The BLI fan system includes a fan thatis configuredto rotate about an axial centerline of the BLI fan system in a first directionof rotation. TheBLI fan system includes blades that are positioned at a first pitch angleconfigured to rotatewith the fan. An electric motor operably coupled with the BLI fan system isconfigured tochange a direction of rotation of the fan to a different, second direction ofrotation. Anactuator operably coupled with the BLI fan system is configured to change aposition ofthe blades of the fan to be positioned at a different, second pitch angle.