Patent ID: 7509811
Filing Date: 2009-03-31
Classification: F23C,F23D,F23N,F23R

Abstract:
1. A method for injecting a fuel/air mixture into a combustor stage of a gas turbine engine comprising the steps of: providing an injector having nozzles arranged in multiple arrays; injecting a fuel/air mixture into said combustor stage by supplying fuel to each said nozzle in each of said arrays via independent flow circuits so that the nozzles in a first of said arrays receive fuel from a first flow circuit and nozzles in a second one of said arrays receive fuel from a second flow circuit; maintaining said nozzles in an outermost one of said arrays at a flame temperature which maintains a stable flame; and said providing step comprising providing a multi-point injector having nozzles arranged in three rings and said maintaining step comprising maintaining an outermost one of said rings at a first flame temperature, maintaining a central one of said rings at a second flame temperature lower than said first flame temperature, and maintaining an inner one of said rings at a third flame temperature higher than at least one of the second and first flame temperatures.