Fuel nozzle swirler assembly
AssigneePratt & Whitney Canada Corp.
InventorsBhawan B. Patel, Oleg Morenko, Nagaraja Rudrapatna
Life of this patent
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Abstract
A fuel nozzle air swirler assembly has a slotted cap to provide stress-relief. The stress-relief slits in the cap have an axial and a tangential component to impart a swirl to the air leaking therethrough in the same direction as that of the air exiting the swirler body.
Claims6
An air swirler assembly for atomizing fuel discharged from a gas turbine engine fuel nozzle, comprising a swirler body having a circumferential array of air swirler vanes defined in a peripheral surface thereof about a central axis, and a cap securely fitted over the swirler body and cooperating with the air swirler vanes to define a plurality of air swirling passages, the cap having an annular body with at least one helical stress-relief slit defined in an outer surface, the helical stress-relief slit being set obliquely to the central axis to turn leakage air flowing from the air swirling passages through the helical stress-relief slit in a same direction as that of the air exiting from the air swirling passages.
Dependencies are inferred from the claim text.