Multiple venturi tube gas fuel injector for catalytic combustor

Details Multiple venturi tube gas fuel injector for catalytic combustor Multiple venturi tube gas fuel injector for catalytic combustor

1987-10-23

1989-07-11

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Combustion products generator

60723, 60739, F02C 322, F02C 722

Patent

active

048459526

ABSTRACT:
A fuel gas injector for a gas turbine engine employs a plurality of closely spaced parallel venturi tubes disposed in a pair of spaced-apart header plates. The venturi tubes are brazed to the header plates and the perimeters of the header plates are sealed to form a plenum into which pressurized gaseous fuel is supplied. Orifices lead from the plenum to throats of the venturi tubes thereby injecting the gaseous fuel at right angles into the high-velocity air stream existing at the throats of the venturi tubes. High shear is imposed on the injected fuel for providing complete mixing with the air. The high air velocity in the throats of the venturi tubes avoids flashback and flameholding. The combined flow from the plurality of venturi tubes mixes downstream thereof to provide a uniform velocity and fuel-air mixture across the flow field. This flow field is suitable for use in a catalyst bed which may be disposed downstream of the venturi tubes.

REFERENCES:
patent: 3472025 (1969-10-01), Simmons et al.
patent: 3691762 (1972-09-01), Ryberg et al.
patent: 4047877 (1977-09-01), Flanagan
patent: 4050238 (1977-09-01), Holzapfel
patent: 4356698 (1982-11-01), Chamberlain
patent: 4534165 (1985-08-01), Davis, Jr. et al.
patent: 4589260 (1986-05-01), Krockow
patent: 4763481 (1988-08-01), Cannon
NASA Conference Publication 2078 Premixed Prevaporized Combustor Technology Forum, Lewis Research Ctr., Cleveland, Ohio.
1/9-10, 1979, "Performance Of A Multiple Venturi Fuel-Air Preparation System," Robert R. Tacina, Lewis Research Ctr.

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