FUEL NOZZLE TO WITHSTAND FLAMEHOLDING INCIDENT AND METHOD OF FORMING FUEL NOZZLE

PROBLEM TO BE SOLVED: To provide a fuel nozzle for avoiding an excessive damages caused by a flameholding incident, withstanding the flameholding incident. SOLUTION: The nozzle 1 includes: an outer annulus 10 defined by an exterior wall 11 and an interior wall 12 and through which air flows to a fuel mixing zone 16 and a combustion zone 50; and an inner annulus 20 arranged within the interior wall 12. The inner annulus 20 includes: a fuel volume D into which fuel is fed to a distal end 23 thereof, which is adjacent to and isolated from the combustion zone 50; and an airflow line 40, arranged between the fuel volume D and the interior wall 12, through which air flows to the combustion zone 50 in a state that the combustion zone 50 is isolated from the fuel volume D. The nozzle 1 also includes a fuse configured to melt during a flameholding incident and to form a breach through which fuel flows from the distal end 23 of the fuel volume D, bypassing the fuel mixing zone 16, to a fuel burning zone 17 downstream from the fuel mixing zone 16. COPYRIGHT: (C)2010,JPO&INPIT