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A low emissions combustion system for a gas turbine engine, including a generally annular combustor with a plurality of tangential fuel injectors to introduce a fuel/air mixture. The annular combustor includes a skirt shaped flow control baffle from the inner liner and air dilution holes in the inne

A low emissions combustion system for a gas turbine engine, including a generally annular combustor with a plurality of tangential fuel injectors to introduce a fuel/air mixture. The annular combustor includes a skirt shaped flow control baffle from the inner liner and air dilution holes in the inner liner underneath the flow control baffle and also in the cylindrical outer liner. The fuel injectors extend through the recuperator housing and into the combustor through an angled tube and then through a tangential guide in the cylindrical outer liner of the combustor housing. The fuel injectors generally comprise an elongated injector tube with the outer end including a coupler having at least one fuel inlet tube. Compressed combustion air is provided to the interior of the elongated injector tube from either holes or slits therein which receive compressed air from the angled tube around the fuel injector which is open to the space between the recuperator housing and the combustor. Flame stabilization occurs outside the injector tube at full power and flashback occurs such the flame stabilization occurs within the injector tube at low power.

대표청구항 ▼

[ What I claim is:] [1.] A combustion method for a gas turbine engine having a compressor, a turbine for driving said compressor, and an annular recuperator, including a housing, for receiving exhaust gases from said turbine to heat the combustion air, said combustion method comprising the steps of:

[ What I claim is:] [1.] A combustion method for a gas turbine engine having a compressor, a turbine for driving said compressor, and an annular recuperator, including a housing, for receiving exhaust gases from said turbine to heat the combustion air, said combustion method comprising the steps of:providing an annular combustor for producing hot combustion gases to drive said turbine, said annular combustor concentrically disposed within said annular recuperator housing with an annular space therebetween, said annular combustor having an outer liner, an inner liner, a generally dome-shaped closed upstream end, and an open discharge end, said outer liner of said annular combustor including a plurality of slanted fuel injector guides tangentially extending therethrough;providing a plurality of spaced angled tubes extending through said recuperator housing aligned with said slanted fuel injector guides of said outer liner of said annular combustor and open to the annular space between said recuperator housing and said combustor;providing a plurality of tangential fuel injectors extending through said recuperator housing in said plurality of angled tubes and said plurality of slanted fuel injector guides in said outer liner of said annular combustor to the closed end of said annular combustor, with one fuel injector extending through one angled tube and one aligned slanted guide,each of said tangential fuel injectors having an elongated injector tube with an outer end and a discharge end, and a fuel distribution centering ring between the outer end and the discharge ends thereof, said centering ring including a plurality of spaced openings for the passage of fuel therethrough, a fuel inlet tube, and a coupler joining the outer end of said elongated injector tube with said fuel inlet tube, said elongated injector tube having a plurality of openings therein downstream of said fuel distribution centering ring;supplying heated compressed air from said recuperator to the openings in said elongated injector tubes downstream of said fuel distribution centering rings;supplying fuel to the fuel inlet tube to be mixed with compressed air in said elongated tube downstream of said fuel distribution centering ring;establishing a combustion flame in the combustion chamber at the discharge end of said elongated injector tube of said tangential fuel injector at full power operation; andflashing-back said flame into the discharge end of a said elongated injector tube and flame stabilization within said fuel injector tube of said tangential fuel injector at low power operation.