초록 ▼

A dual mode, dual stage low NOx combustor, includes a primary combustion chamber and a secondary combustion chamber separated by a throat region of reduced diameter. Fuel is input into the primary combustors by an annular array of diffusion type nozzles whereas in accordance with the invention fuel

A dual mode, dual stage low NOx combustor, includes a primary combustion chamber and a secondary combustion chamber separated by a throat region of reduced diameter. Fuel is input into the primary combustors by an annular array of diffusion type nozzles whereas in accordance with the invention fuel is input into the secondary combustor by a central combination premix and diffusion nozzle.

대표청구항 ▼

A combined diffusion and premix nozzle comprising: a diffusion pilot comprising a first axial fuel delivery pipe having an inlet end and a discharge end; a second axial air delivery pipe coaxial with the first axial fuel delivery pipe and surrounding the first axial fuel delivery pipe; and, a first

A combined diffusion and premix nozzle comprising: a diffusion pilot comprising a first axial fuel delivery pipe having an inlet end and a discharge end; a second axial air delivery pipe coaxial with the first axial fuel delivery pipe and surrounding the first axial fuel delivery pipe; and, a first swirler annulus disposed at the discharge end of the first axial fuel delivery pipe between the first axial fuel delivery pipe and the surround second axial air delivery pipe; the first axial fuel delivery pipe further including a plurality of radial fuel distribution tubes extending outwardly from the first axial fuel delivery pipe and located toward the inlet end of the first axial fuel delivery pipe, the radial fuel distribution tubes extending beyond the circumference of the second axial air delivery pipe; said second axial air delivery pipe having an air inlet end upstream of said radial fuel distribution tubes; a premix chamber surrounding the diffusion pilot and including an inlet end and a discharge end, the radial fuel distribution tubes extending into the premix chamber; at least one fuel discharge hole in at least one radial fuel distribution tube, the fuel discharge hole directed toward the discharge end of the premix chamber; and, a second swirler annulus at the discharge end of the premix chamber between the second axial air delivery pipe and the surrounding premix chamber.