US 12,103,695 B2
Exhaust nozzle assembly for an aircraft propulsion system
Michel Labrecque, Sainte-Julie (CA); and Kevin Nguyen, Montreal (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by Pratt & Whitney Canada Corp., Longueuil (CA)
Filed on Sep. 20, 2022, as Appl. No. 17/948,870.
Prior Publication US 2024/0092496 A1, Mar. 21, 2024
Int. Cl. B64D 33/04 (2006.01); B64D 27/10 (2006.01); B64D 29/00 (2006.01); F02K 1/06 (2006.01); F02K 1/08 (2006.01); F02K 1/09 (2006.01); F02K 1/36 (2006.01)
CPC B64D 33/04 (2013.01) [B64D 27/10 (2013.01); B64D 29/00 (2013.01); F02K 1/06 (2013.01); F02K 1/08 (2013.01); F02K 1/09 (2013.01); F02K 1/36 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A propulsion system comprising:
a primary nozzle extending along an exhaust centerline of the propulsion system, the primary nozzle including a downstream axial end;
an outer shroud surrounding the primary nozzle, the outer shroud forming a secondary annulus between the primary nozzle and the outer shroud;
an ejector nozzle including a tubular nozzle body, the tubular nozzle body extending axially between and to a first axial end of the tubular nozzle body and a second axial end of the tubular nozzle body, the tubular nozzle body extends circumferentially about the exhaust centerline from the first axial end to the second axial end, the first axial end disposed at the outer shroud, the second axial end disposed downstream of the first axial end, the second axial end forming a nozzle exit plane for the exhaust nozzle assembly, the tubular nozzle body forms a first converging portion and a second converging portion of the tubular nozzle body, the first converging portion and the second converging portion extend circumferentially about the exhaust centerline, the second converging portion is directly connected to and fixed relative to the first converging portion, the second converging portion extends axially between and to the first converging portion and the second axial end, the tubular nozzle body forming a mixing cross-sectional area between the primary nozzle and the tubular nozzle body at the downstream axial end; and
an actuator mounted on the tubular nozzle body, the actuator configured to axially translate the tubular nozzle body between a first axial position and a second axial position, relative to the outer shroud, to control an area of the mixing cross-sectional area, the mixing cross-sectional area having a first area with the tubular nozzle body in the first axial position and a second area with the tubular nozzle body in the second axial position, the first area greater than the second area.