A boundary layer ingestion fan system for location aft of the fuselage of an aircraft is shown. It comprises a nacelle (501) defining a duct (502), and a fan (503) located within the duct. The fan comprises a hub arranged to rotate around a rotational axis (A-A) and a plurality of blades attached to the hub. Each blade has a span (r) from a root at the hub defining a 0 percent span position (r = 0) to a tip defining a 100 percent span position (r = 1) and a plurality of span positions therebetween (r ∈ [0, 1]), and a leading edge and a trailing edge defining, for each span position, a chord therebetween having a chord length (c). For each one of said plurality of blades, the ratio of chord length at the 0 percent span position (chub) to chord length at the 100 percent span position (ctip) is 1 or greater.
BOUNDARY LAYER INGESTION FAN SYSTEM
GRENZSCHICHTAUFNAHMEGEBLÄSESYSTEM
SYSTÈME DE VENTILATEUR D'INGESTION DE COUCHE LIMITE
2022-04-20
Patent
Electronic Resource
English