초록 ▼

A gas turbine fuel injection system of the lean direct injector type designed to reduce nitrous oxide (NOx) emissions is provided. The configuration includes a pilot fuel injector for injecting a pilot fuel stream, and a pilot swirler for providing a swirling pilot air stream to atomize and entrain

A gas turbine fuel injection system of the lean direct injector type designed to reduce nitrous oxide (NOx) emissions is provided. The configuration includes a pilot fuel injector for injecting a pilot fuel stream, and a pilot swirler for providing a swirling pilot air stream to atomize and entrain the pilot fuel stream. A main airblast fuel injector is located concentrically about the pilot fuel injector, for injecting a main fuel stream concentrically about the pilot fuel stream. Inner and outer main swirlers provide a swirling main air stream to atomize and entrain the main fuel stream. An air splitter is located between the pilot swirler and the main swirler. The air splitter is so arranged and constructed as to divide the pilot air stream exiting the pilot swirler and the air splitter, from the main air stream exiting the inner main swirler, whereby a bifurcated recirculation zone is created.

대표청구항 ▼

[ What is claimed is:] [1.]1. A fuel injection system for a gas turbine, comprising:a pilot fuel injector;a pilot swirler for swirling air past the pilot fuel injector;a main airblast fuel injector;inner and outer main swirlers for swirling air past the main airblast fuel injector; andan air splitte

[ What is claimed is:] [1.]1. A fuel injection system for a gas turbine, comprising:a pilot fuel injector;a pilot swirler for swirling air past the pilot fuel injector;a main airblast fuel injector;inner and outer main swirlers for swirling air past the main airblast fuel injector; andan air splitter, located between the pilot swirler and the inner main swirler, the air splitter being so arranged and constructed to divide a pilot air stream exiting the pilot swirler and the air splitter, from a main air stream exiting the inner main swirler, whereby a bifurcated recirculation zone is created between the pilot air stream and the main air stream.