Kyung Ae Choi

US Patent:

56807651, Oct 28, 1997

Filed:

Jan 5, 1996

Appl. No.:

8/583629

Inventors:

Kyung J. Choi - Wyndmoor PA
Robert Tacina - Brunswick OH

International Classification:

F02C 100

US Classification:

60740

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.

US Patent:

60677902, May 30, 2000

Filed:

Oct 28, 1997

Appl. No.:

8/958141

Inventors:

Kyung J. Choi - Glenside PA
Robert Tacina - Brunswick OH

International Classification:

F02C 100

US Classification:

60 3906

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. In addition, in order to further improve combustion, the fuel can be injected at a venturi located in the combustion chamber at a point adjacent the air swirler.