Turbine blade ring segment, and turbine and gas turbine including the same

A turbine configured to pass combustion gas supplied from a combustor through an interior of the turbine to generate a driving force, the turbine comprising:

• a turbine rotor configured to be rotated by the combustion gas, the turbine rotor including a plurality of turbine disks and a plurality of turbine blades coupled to an outer surface of each of the plurality of turbine disks;
• a turbine casing for housing the turbine rotor;
• and
• a turbine blade ring segment comprising:
• an inner panel configured to be mounted to an inner surface of the turbine casing, the inner panel including a plurality of flow holes for supplying cooling air from an outside of the turbine casing, the plurality of flow holes including centrally disposed flow holes disposed in a central portion of the inner panel;
• and
• an outer panel disposed on one surface of the inner panel, the outer panel including a plurality of air passages for communicating with the plurality of flow holes formed in the inner panel, the plurality of air passages including a first flow passage formed in a central portion of the outer panel and configured to guide the supplied cooling air in a flow direction of the combustion gas, a second flow passage formed in the outer panel separately from the first flow passage and configured to guide the supplied cooling air in the flow direction of the combustion gas, and a third flow passage communicating with the second flow passage to feed the supplied cooling air to the second flow passage,
• wherein the first flow passage comprises:
• a plurality of flow grooves each including one end formed at a position corresponding to the centrally disposed flow holes and another end communicating with a vortex forming space, and
• a curved flow passage formed at the one end,
• wherein each flow groove of the plurality of flow grooves includes an elongated groove arranged along the flow direction of the combustion gas and connected between the curved flow passage and the vortex forming space.

A gas turbine comprising:

• a compressor to draw air and compress the drawn air;
• a combustor to generate combustion gas by combusting fuel mixed with the compressed air;
• and
• a turbine comprising
• a turbine rotor configured to be rotated by the combustion gas, the turbine rotor including a plurality of turbine disks and a plurality of turbine blades coupled to an outer surface of each of the plurality of turbine disks;
• a turbine casing for housing the turbine rotor;
• and
• a turbine blade ring segment comprising:
• an inner panel configured to be mounted to an inner surface of the turbine casing, the inner panel including a plurality of flow holes for supplying cooling air from an outside of the turbine casing, the plurality of flow holes including centrally disposed flow holes disposed in a central portion of the inner panel;
• and
• an outer panel disposed on one surface of the inner panel, the outer panel including a plurality of air passages for communicating with the plurality of flow holes formed in the inner panel, the plurality of air passages including a first flow passage formed in a central portion of the outer panel and configured to guide the supplied cooling air in a flow direction of the combustion gas, a second flow passage formed in the outer panel separately from the first flow passage and configured to guide the supplied cooling air in the flow direction of the combustion gas, and a third flow passage communicating with the second flow passage to feed the supplied cooling air to the second flow passage,
• wherein the first flow passage comprises:
• a plurality of flow grooves each including one end formed at a position corresponding to the centrally disposed flow holes and another end communicating with a vortex forming space, and
• a curved flow passage formed at the one end,
• wherein each flow groove of the plurality of flow grooves includes an elongated groove arranged along the flow direction of the combustion gas and connected between the curved flow passage and the vortex forming space.