Abstract:
A combustor liner assembly (10) includes an outer shell (14) made of a ceramic composite and an inner heat shell (16) that is supported within the outer shell (14). The inner heat shield (16) defines a surface that is exposed to combustion gases. The inner heat shield (16) is made of material that is compatible with the ceramic matrix composite and that provides favorable thermal gradient capability for a combustion chamber.
Abstract:
A method for burning fuel in the combustor of a gas turbine engine with a premixing type of combustion which comprises providing a scroll swirler (14) having first and second endplates (16,18), the first endplate is spaced relation to the second endplate defining a substantially cylindrical mixing zone (28) therebetween, the second endplate having a combustor inlet port (20) extending therethrough, providing a centerbody (12) located within the mixing zone and having a radially outer surface that tapers toward the combustor inlet and extends substantially the entire length of the mixing zone, introducing a first portion of combustion air tangentially into the mixing zone substantially continuously along the length thereof, introducing a first portion of fuel into the combustion air as the combustion air is introduced into the mixing zone, mixing the combustion air and fuel by swirling the combustion air and fuel about the centerbody while flowing the combustion air and fuel towards the combustor inlet, flowing the first portion of combustion air into the combustor inlet, introducing a second portion of combustion air into the first portion radially inward thereof at the combustor inlet, the sum of the first and second portions of combustion air defining total airflow, and the second portion of combustion air equal to 85-89% of the total airflow, and burning the fuel external of the mixing zone.
Abstract:
A tangential air entry fuel nozzle 10 has a combustor inlet port 20 to permit air and fuel to exit into a combustor. The port includes a convergent surface 116, a divergent surface 117, and a cylindrical surface 118 extending therebetween. The convergent surface 116 extends a first distance along the longitudinal axis of the nozzle, the cylindrical surface 118 extends a second distance along the axis, and the second distance is at least 5% of the first distance.