초록

A fuel nozzle having a dedicated circuit to cool the diffusion tip with lower part count and reduced complexity. More specifically, the proposed design uses an independent circuit to cool the tip with diffusion fuel or purge air. An impingement plate may be provided to augment the cooling effect.

대표청구항 ▼

What is claimed is: 1. A fuel nozzle, comprising:a burner tube component;a center body assembly concentrically disposed within said burner tube component;a premix flow passage defined between said burner tube component and said nozzle center body;a diffusion tip, said diffusion tip comprising a peri

What is claimed is: 1. A fuel nozzle, comprising:a burner tube component;a center body assembly concentrically disposed within said burner tube component;a premix flow passage defined between said burner tube component and said nozzle center body;a diffusion tip, said diffusion tip comprising a peripheral wall mounted to said center body assembly, an imperforate axial end wall at a distal axial end of said peripheral wall, peripheral orifices defined in said peripheral wall adjacent said axial end wall, and a diffusion tip shroud disposed in surrounding relation to said peripheral wall and mounted to said center body so as to define a cooling air flow passage therebetween, said peripheral orifices being in direct flow communication with axial air passages of said cooling air flow passage surrounding said diffusion tip; anda diffusion fuel passage defined within said center body assembly and terminating distally at an inner surface of said substantially imperforate end wall, wherein said inner surface of said substantially imperforate end wall is turbulated so as to enhance cooling thereof.