Injector, combustor comprising same, and gas turbine comprising same

A burner comprising:

• a supply pipe configured to supply a fuel and air;
• an injector coupled to the supply pipe and configured to inject the fuel and the air, which are introduced thereinto;
• and
• a combustion chamber configured such that the fuel and the air injected by the injector are introduced thereinto,
• wherein the injector includes:
• an injector body;
• a slit formed to pass the injector body along a reference direction, and
• wherein the slit includes:
• a first slit portion having a shape that extends along a circumferential direction of an imaginary reference circle, a center of which is an imaginary reference axis that extends along the reference direction;
• and
• a second slit portion having a shape that extends along a radial direction of the reference circle,
• wherein the first slit portion includes:
• a (1-1)-th slit having a shape that extends along an imaginary first reference circle, a center of which is the reference axis;
• and
• a (1-2)-th slit having a shape that extends along a circumferential direction of an imaginary second reference circle, a center of which is the reference axis and a diameter of which is larger than that of the first reference circle,
• wherein when it is assumed that an area between the first reference circle and the second reference circle is a first area,
• the second slit portion includes:
• a (2-1)-th slit disposed in the first area and extending in a radial direction of the first reference circle, and
• wherein the (2-1)-th slit includes a part disposed between the (1-1)-th slit and the (1-2)-th slit with respect to the radial direction of the first reference circle,
• wherein the (1-1)-th slit defines a first reference arc which is a portion of the first reference circle,
• wherein the (1-2)-th slit defines a second reference arc which is a portion of the second reference circle,
• wherein the part of the (2-1)-th slit is formed on an area where a central angle of a first fan shape defining the first reference arc and a central angle of a second fan shape defining the second reference arc overlap each other, and
• wherein the injector body includes a part surrounded by the (1-1)-th slit and positioned at the center of the reference circle so as to close the reference axis.

A gas turbine comprising:

• a compressor configured to compress and discharge air;
• a burner configured to mix a fuel and the air compressed and discharged by the compressor, and then generate a combustion gas by burning a mixture of the fuel and the air;
• and
• turbine blades configured to be rotated by the combustion gas delivered from the burner,
• wherein the burner includes:
• an injector configured to inject the fuel and the air compressed and discharged by the compressor, which are mixed, and
• wherein the injector includes:
• an injector body;
• a slit formed to pass the injector body along a reference direction, and
• wherein the slit includes:
• a first slit portion having a shape that extends along a circumferential direction of an imaginary reference circle, a center of which is an imaginary reference axis that extends along the reference direction;
• and
• a second slit portion having a shape that extends along a radial direction of the reference circle,
• wherein the first slit portion includes:
• a (1-1)-th slit having a shape that extends along an imaginary first reference circle, a center of which is the reference axis;
• and
• a (1-2)-th slit having a shape that extends along a circumferential direction of an imaginary second reference circle, a center of which is the reference axis and a diameter of which is larger than that of the first reference circle,
• wherein when it is assumed that an area between the first reference circle and the second reference circle is a first area,
• the second slit portion includes:
• a (2-1)-th slit disposed in the first area and extending in a radial direction of the first reference circle, and
• wherein the (2-1)-th slit includes a part disposed between the (1-1)-th slit and the (1-2)-th slit with respect to the radial direction of the first reference circle,
• wherein the (1-1)-th slit defines a first reference arc which is a portion of the first reference circle,
• wherein the (1-2)-th slit defines a second reference arc which is a portion of the second reference circle,
• wherein the part of the (2-1)-th slit is formed on an area where a central angle of a first fan shape defining the first reference arc and a central angle of a second fan shape defining the second reference arc overlap each other, and
• wherein the injector body includes a part surrounded by the (1-1)-th slit and positioned at the center of the reference circle so as to close the reference axis.