초록 ▼

A fuel manifold of a gas turbine engine includes a tube assembly having substantially rigid inner tubes disposed inside of substantially rigid outer tubes in pairs, concentrically spaced apart by a spacer apparatus. The inner tubes form a primary fuel passage for directing a primary fuel flow and th

A fuel manifold of a gas turbine engine includes a tube assembly having substantially rigid inner tubes disposed inside of substantially rigid outer tubes in pairs, concentrically spaced apart by a spacer apparatus. The inner tubes form a primary fuel passage for directing a primary fuel flow and the outer tubes form a secondary fuel passage for directing a secondary fuel flow, the secondary flow being greater than the primary flow.

대표청구항 ▼

What is claimed is: 1. A gas turbine engine comprisingan external engine case;a fuel source;a combustor having an array of fuel nozzles including at least one starter nozzle, the at least one starter nozzle being less than half of the fuel nozzles of the array of fuel nozzles; anda manifold communic

What is claimed is: 1. A gas turbine engine comprisingan external engine case;a fuel source;a combustor having an array of fuel nozzles including at least one starter nozzle, the at least one starter nozzle being less than half of the fuel nozzles of the array of fuel nozzles; anda manifold communicating between the fuel source and the array of fuel nozzles, the manifold being mounted circumferentially around an external side of the external engine case and the manifold having a tube assembly including a plurality of metal inner and outer tube pairs, an inner tube being disposed inside an outer tube and concentrically spaced apart from the outer tube by a spacer apparatus between the inner and outer tubes, the inner tube being rigid and in fluid communication with said at least one starter fuel nozzle for directing a primary fuel flow to said at least one starter fuel nozzle, the outer tube being rigid and in fluid communication with a remainder of the fuel nozzles of the array of fuel nozzles for directing a secondary fuel flow to said remainder of the fuel nozzles, the secondary fuel flow being greater than the primary fuel flow.