US 12,442,532 B2
Exhaust mixer with protrusions
Metin Ilbay Yaras, Ottawa (CA); Mark Cunningham, Montreal-West (CA); and Raja Ramamurthy, Montreal (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Jan. 10, 2023, as Appl. No. 18/152,336.
Prior Publication US 2024/0230089 A1, Jul. 11, 2024
Int. Cl. F23R 3/02 (2006.01); B01F 23/10 (2022.01); B01F 25/10 (2022.01)
CPC F23R 3/02 (2013.01) [B01F 23/10 (2022.01); B01F 25/10 (2022.01)] 18 Claims
OG exemplary drawing
 
1. An exhaust mixer assembly for a gas turbine engine, the exhaust mixer assembly comprising:
a core passage extending along a central axis of the gas turbine engine for directing a core gas flow;
an outer annular passage coaxially surrounding the core passage for directing a bypass gas flow; and
an exhaust mixer communicating with the core passage and the outer annular passage, the exhaust mixer having an upstream end, a downstream end and an annular wall extending therebetween, a plurality of protrusions extending axially from a downstream end of the annular wall to form a jagged trailing edge of the exhaust mixer, each of the plurality of protrusions extending from a protrusion base at the downstream end of the annular wall to a protrusion tip, each of the plurality of protrusions extending separately from the downstream end of the annular wall from the other of the plurality of protrusions such that there is an absence of interconnection between adjacent protrusions from each protrusion base to protrusion tip, at least one of the plurality of protrusions being twisted, from the protrusion base to the protrusion tip, about a protrusion axis extending through the at least one of the plurality of protrusions, the protrusion axis parallel to the central axis, the protrusion axis defining a center of rotation about which the at least one of the plurality of protrusions is twisted.