Tile attachment scheme for counter swirl doublet

A cartridge, comprising:

• a cartridge surface;
• a cartridge bevel bordering the cartridge surface;
• a cartridge perimeter bordering the cartridge bevel;
• at least one chute integral to the cartridge;
• at least two studs integral to the cartridge;
• and
• a plurality of holes in the cartridge surface, the plurality of holes having a combined principal orifice area;
• and
• wherein the cartridge is attached on an inner surface of a single-walled combustion liner of an annular combustor of a gas turbine engine and spans across an associated feed hole in the single-walled combustion liner;
• wherein the inner surface of the single-walled combustion liner faces a combustion chamber of the annular combustor;
• wherein the cartridge perimeter contacts the inner surface of the single-walled combustion liner;
• wherein the cartridge perimeter is larger than the associated feed hole in the single-walled combustion liner;
• wherein the cartridge surface does not contact the inner surface of the single-walled combustion liner such that a radial gap is between the inner surface of the single-walled combustion liner and the cartridge surface, the associated feed hole extending over a subtended feed area of the cartridge surface;
• and
• wherein the subtended feed area is at least four times greater than the combined principal orifice area.

A method of attaching a cartridge to a combustion liner of an annular combustor of a gas turbine engine, the method comprising:

• providing a cartridge, comprising:
• a cartridge surface;
• a cartridge bevel bordering the cartridge surface;
• a cartridge perimeter bordering the cartridge bevel;
• at least one chute integral to the cartridge;
• at least two studs integral to the cartridge;
• and
• a plurality of holes through the cartridge surface, the plurality of holes within the cartridge perimeter, the plurality of holes having a combined principal orifice area, each hole of the plurality of holes having a peripheral edge that surrounds the hole and is defined by the cartridge surface;
• contacting the cartridge perimeter with an inner surface of the combustion liner, wherein the inner surface faces a combustion chamber of the annular combustor and does not contact the cartridge surface, wherein each of the at least two studs projects through an associated stud hole in the combustion liner, wherein the cartridge perimeter is larger than an associated feed hole in the combustion liner and the cartridge spans across the associated feed hole, and wherein the associated feed hole extends over a subtended feed area of the cartridge surface;
• and
• fastening a nut on each of the at least two studs so as to retain the cartridge in the combustion liner;
• wherein the combustion liner is a single-walled combustion liner;
• and
• wherein the subtended feed area is greater than the combined principal orifice area.