US 12,421,914 B2
Compact infrared suppressors with ring vanes for gas turbine engines
Curtlan C. Betchley, Indianapolis, IN (US); Kenneth M. Pesyna, Indianapolis, IN (US); Bryan H. Lerg, Indianapolis, IN (US); Steven T. Berenyi, Indianapolis, IN (US); Andrew M. Simonich, Indianapolis, IN (US); and Victor L. Oechsle, Indianapolis, IN (US)
Assigned to Rolls-Royce North American Technologies Inc., Indianapolis, IN (US)
Filed by Rolls-Royce North American Technologies Inc., Indianapolis, IN (US)
Filed on Dec. 6, 2024, as Appl. No. 18/972,575.
Application 18/972,575 is a continuation of application No. 18/371,810, filed on Sep. 22, 2023, granted, now 12,180,910.
Prior Publication US 2025/0101932 A1, Mar. 27, 2025
Int. Cl. F02K 1/82 (2006.01)
CPC F02K 1/825 (2013.01) 14 Claims
OG exemplary drawing
 
1. An infrared suppressor adapted for use with a gas turbine engine, the infrared suppressor comprising:
a first ring arranged circumferentially around an axis, the first ring having a forward end of the first ring, an aft end of the first ring that is spaced apart axially from the forward end of the first ring relative to the axis, and a first radial extreme located axially between the forward end of the first ring and the aft end of the first ring relative to the axis,
a second ring arranged circumferentially around the axis and aligned axially with the first ring, the second ring having a forward end of the second ring, an aft end of the second ring that is spaced apart axially from the forward end of the second ring relative to the axis, and a second radial extreme located axially between the forward end of the second ring and the aft end of the second ring relative to the axis, and
a third ring arranged circumferentially around the axis and aligned axially with the first ring and the second ring, the third ring having a forward end of the third ring, an aft end of the third ring that is spaced apart axially from the forward end of the third ring relative to the axis, and a third radial extreme located axially between the forward end of the third ring and the aft end of the third ring relative to the axis,
wherein the second radial extreme of the second ring extends radially away from the forward end and the aft end of the second ring and toward the first ring such that the forward end of the first ring, the aft end of the first ring, and the second radial extreme cooperate to block line-of-sight between the first ring and the second ring for all angles of view when looking axially forward at the infrared suppressor,
wherein the third radial extreme of the third ring extends radially away from the forward end and the aft end of the third ring and toward the second ring such that the forward end of the second ring, the aft end of the second ring, and the third radial extreme cooperate to block line-of-sight between the second ring and the third ring for all angles of view when looking axially forward at the infrared suppressor,
further comprising a first strut that extends radially between and interconnects the first ring and the second ring, and the first strut extends radially at a canted angle relative to the axis such that the canted angle does not intersect the axis.