US 12,448,918 B2
Diffuser with passlets
Juntao Zhang, Mason, OH (US); Nicholas R. Overman, Sharonville, OH (US); Steven C. Vise, Loveland, OH (US); Andrew Wickersham, Liberty Township, OH (US); and Michael A. Benjamin, Cincinnati, OH (US)
Assigned to GENERAL ELECTRIC COMPANY, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on May 9, 2022, as Appl. No. 17/662,535.
Prior Publication US 2023/0358170 A1, Nov. 9, 2023
Int. Cl. F02C 7/00 (2006.01); F02C 7/04 (2006.01)
CPC F02C 7/04 (2013.01) [F05D 2240/35 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A diffuser in flow communication with a combustor of a turbomachine engine, the combustor comprising a dome, an outer liner, and an inner liner, the diffuser comprising:
an outer annular wall having a radially outer surface and a radially inner surface; and
an inner annular wall having a radially outer surface and a radially inner surface, the radially outer surface of the inner annular wall and the radially inner surface of the outer annular wall together defining a primary passage therebetween, the primary passage extending in an aft direction of the diffuser from a forward end of the diffuser and through an aft end of the diffuser, the aft end of the diffuser being disposed at an axial distance from the dome of the combustor, such that air flows in the aft direction along the primary passage toward the dome,
wherein the outer annular wall defines an outer passlet that extends into the radially inner surface and through the radially outer surface thereof, such that a first portion of the air within the primary passage flows through the outer passlet in a first direction and exits toward a radially outer surface of the outer liner of the combustor, the first direction being at a first angle relative to the aft direction, the outer passlet extending partially around a circumference of the outer annular wall and a downstream end thereof being spaced from a downstream end of the outer annular wall,
wherein the inner annular wall defines an inner passlet that extends into the radially outer surface and through the radially inner surface thereof, such that a second portion of the air within the primary passage flows through the inner passlet in a second direction and exits toward a radially inner surface of the inner liner of the combustor, the second direction being at a second angle relative to the aft direction, the inner passlet extending partially around a circumference of the inner annular wall and a downstream end thereof being spaced from a downstream end of the inner annular wall,
wherein an outer passage of the combustor is partially defined by the radially outer surface of the outer liner, and an inner passage of the combustor is partially defined by the radially inner surface of the inner liner, and
wherein the outer passlet is arranged such that the first portion of the air from the primary passage flows through the outer passlet towards the outer passage, and the inner passlet is arranged such that the second portion of the air from the primary passage flows through the inner passlet towards the inner passage.