US 11,053,850 B2
Gas turbine
Jae Yeon Choi, Busan (KR)
Filed by DOOSAN HEAVY INDUSTRIES & CONSTRUCTION CO., LTD., Changwon-si (KR)
Filed on Aug. 30, 2018, as Appl. No. 16/116,924.
Claims priority of application No. 10-2017-0126850 (KR), filed on Sep. 29, 2017.
Prior Publication US 2020/0025382 A1, Jan. 23, 2020
Int. Cl. F01D 5/18 (2006.01); F02C 7/18 (2006.01)
CPC F02C 7/18 (2013.01) [F01D 5/186 (2013.01); F05D 2220/32 (2013.01); F05D 2240/303 (2013.01); F05D 2260/20 (2013.01); F05D 2260/201 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A gas turbine comprising:
a turbine blade including a leading edge, a trailing edge, and a plurality of partition walls defining a cooling passage for passing cooling air inside the turbine blade, the plurality of partition walls including a first partition wall that faces the leading edge and is divided in a vertical direction according to a plurality of sections of the leading edge that are arranged from a hub of the turbine blade to a tip of the turbine blade, the turbine blade from the hub to the tip having a length L and being divided into first, second, and third sections of the leading edge such that each of the first, second, and third sections has a length of L/3, the first section extending from the hub to a position L/3, the third section extending from the tip to a position 2L/3, and the second section situated between the first and third sections; and
an injection nozzle disposed in the first partition wall and configured to cool an inner surface of the leading edge, the injection nozzle comprising a plurality of nozzle protrusions each of which protrudes from the first partition wall toward the leading edge and surrounds an injection hole formed in the first partition wall, each of the plurality of nozzle protrusions including an inlet and an outlet and being inclined in a specific direction according to one of the first to third sections,
wherein the plurality of nozzle protrusions are configured to inject cooling air in a different direction for each section of the plurality of sections, each section of the plurality of sections juxtaposed to nozzle protrusions injecting cooling air in only one direction,
wherein the plurality of nozzle protrusions include a plurality of first nozzle protrusions, a plurality of second nozzle protrusions, and a plurality of third nozzle protrusions and are arranged in the first partition wall such that each of the plurality of first nozzle protrusions faces the first section, each of the plurality of second nozzle protrusions faces the second section, and each of the plurality of third nozzle protrusions faces the third sections,
wherein the specific direction of each of the plurality of third nozzle protrusions is inclined upward toward the leading edge in the third section,
wherein each of the plurality of first nozzle protrusions extends directly toward the leading edge in the first section, and
wherein each of the plurality of second nozzle protrusions extends directly toward the leading edge in the second section.