US 12,305,537 B2
Vane assembly for open fan engine
Sara Elizabeth Carle, Columbus, OH (US); Daniel L. Tweedt, West Chester, OH (US); and Syed Arif Khalid, West Chester, OH (US)
Assigned to General Electric Company, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Aug. 4, 2023, as Appl. No. 18/230,611.
Prior Publication US 2025/0043688 A1, Feb. 6, 2025
Int. Cl. F01D 9/04 (2006.01); F01D 5/14 (2006.01)
CPC F01D 9/041 (2013.01) [F01D 5/141 (2013.01); F01D 5/148 (2013.01); F05D 2220/36 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A vane assembly for an open fan engine having a rotor with an axis of rotation and a stator, the vane assembly comprising a plurality of vanes, each arranged about the stator at a different circumferential location θ, where θ is measured relative to a circumferential positioning vector (CPV) defined as the cross-product of V1 and V2 (V1×V2), and θ increases in the direction of rotor rotation, each of the plurality of vanes having a chord (C), and a leading edge (LE), leading edge angle (LEA) and a mean camber line (MCL) at a span of the vane, a delta in leading angle (DLEA) from an average leading edge angle (ALEA) at that span for each of the plurality of vanes being between:

OG Complex Work Unit Math
and
3.5*cos(θ)−7.5
wherein a first reference line (R1) at the span of the vane has a starting point (SP) at the LE and on the mean camber line (MCL) and an end point (EP) on the MCL at between 2% and 15% of the C measured from the LE;
wherein a second reference line (R2) extends forward from the EP of the R1 in a direction toward the LE and parallel to the axis of rotation; and
wherein the LEA is measured from the R2 to the R1 in the direction of rotor rotation.