EXTERNALLY FUELED TRAPPED VORTEX CAVITY AUGMENTOR

摘要

A gas turbine engine augmentor (34) includes an externally fueled annular trapped vortex cavity (50) having a cavity opening (142) open to an exhaust flowpath (128) and a sole source of fuel (75) located upstream of the trapped vortex cavity (50) and being operable for injecting fuel (75) into the exhaust flowpath (128) such that at least a portion of the fuel (75) flows into the cavity (50) through a cavity openi ng (142). An exemplary sole source of fuel (75) includes fuel holes (153) in fuel tube s (51) within spray bars (53 and/or 59) operable for injecting the fuel (75) throug h heat shield openings (166) in heat shields (54 and/or 204) surrounding the tubes (51) wherein the fuel holes (153) are located in a radially outermost portion (15 8) of the exhaust flowpath (128). The sole source of fuel (75) may include circumferentially spaced apart radial spray bars (53) and/or integral spray bars (59) integral with radial flameholders (52) and extending radially inwardly into the exhaust flowpath (128) wherein the radial flameholders (52) and radial spray bars (53) are interdigitated.