초록 ▼

The arrangement comprises a swirler for producing at least one air stream for mixing with a supply of fuel but wherein the supply of fuel is initially injected into at least one zone adjacent a respective air stream but shielded (by 26) therefrom whereby fuel-rich pockets of fluid are formed in the

The arrangement comprises a swirler for producing at least one air stream for mixing with a supply of fuel but wherein the supply of fuel is initially injected into at least one zone adjacent a respective air stream but shielded (by 26) therefrom whereby fuel-rich pockets of fluid are formed in the zone(s). The pockets ensure flame stability at least at lower power settings. The zone is defined by a wall of the swirler. The fuel is injected through nozzles. Additional nozzles for supplementary supply of fuel may be provided in a block. A plate is arranged between the block and the swirler.

대표청구항 ▼

[ I claim:] [1.] A fuel injector arrangement for a turbine, said injector arrangement having a longitudinal axis and comprising: at least one swirler means having at least one air inlet means for entry of air into said at least one swirler means to provide the air for producing at least one air stre

[ I claim:] [1.] A fuel injector arrangement for a turbine, said injector arrangement having a longitudinal axis and comprising: at least one swirler means having at least one air inlet means for entry of air into said at least one swirler means to provide the air for producing at least one air stream for mixing with a supply of fuel, said at least one air stream having a radial component of flow directed towards said longitudinal axis; injecting means for injecting said supply of fuel with a component of flow parallel to said longitudinal axis towards said at least one air stream and into said at least one swirler means for mixing of fuel and air; and shield means being provided adjacent said at least one air inlet means, said shield means at least partly shielding said supply of fuel from said at least one air stream in at least one region of said injector arrangement whereby, in said at least one region, fuel-rich pockets of fluid are formed. [20.] A method of operating a fuel injector arrangement of a turbine, said arrangement having a longitudinal axis and including a swirler means having an air inlet means for entry of air, the method comprising the steps of: utilizing said swirler means for entry of the air therein to provide the air to produce at least one air stream having a radial component of flow directed towards said longitudinal axis; injecting fuel with a component of fuel flow parallel to said longitudinal axis towards said air stream and into said swirler means for mixing of fuel and air; and at least partly shielding said injected fuel from said air stream in at least one region of said injector arrangement by providing a shield means adjacent the air inlet means so as to give rise to fuel-rich pockets of fluid in said at least one region.