Lean direct wall fuel injection method and devices

Details Lean direct wall fuel injection method and devices Lean direct wall fuel injection method and devices

1996-01-05

1997-10-28

Freay, Charles G.

Power plants

Combustion products used as motive fluid

Combustion products generator

60 3906, 60746, 239434, F02C 100

Patent

active

056807651

ABSTRACT:
A fuel combustion chamber, and a method of and a nozzle for mixing liquid fuel and air in the fuel combustion chamber in lean direct injection combustion for advanced gas turbine engines, including aircraft engines. Liquid fuel in a form of jet is injected directly into a cylindrical combustion chamber from the combustion chamber wall surface in a direction opposite to the direction of the swirling air at an angle of from about 50.degree. to about 60.degree. with respect to a tangential line of the cylindrical combustion chamber and at a fuel-lean condition, with a liquid droplet momentum to air momentum ratio in the range of from about 0.05 to about 0.12. Advanced gas turbines benefit from lean direct wall injection combustion. The lean direct wall injection technique of the present invention provides fast, uniform, well-stirred mixing of fuel and air.

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N. Ahmad, et al., "Centrifugal Mixing in Gas and Liquid Fuelled Lean Swirl Stabilised Primary Zones", Int'l Journal of Turbo and Jet Engines 3, 319-329 (Jan. 1986).
N. Ahmad, et al., "Gas and Liquid Fuel Injection into an Enclosed Swirling Flow", Int'l Journal of Turbo and Jet Engines 3, 331-342 (Jan. 1986).

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