US 12,140,038 B2
Turbine airfoil, turbine, and gas turbine including same
Hyun Woo Joo, Changwon (KR)
Assigned to DOOSAN ENERBILITY CO., LTD., Changwon (KR)
Filed by DOOSAN ENERBILITY CO., LTD., Changwon-si (KR)
Filed on Sep. 17, 2022, as Appl. No. 17/933,085.
Claims priority of application No. 10-2021-0145024 (KR), filed on Oct. 27, 2021.
Prior Publication US 2023/0128531 A1, Apr. 27, 2023
Int. Cl. F01D 25/12 (2006.01); F01D 9/06 (2006.01)
CPC F01D 25/12 (2013.01) [F01D 9/06 (2013.01); F05D 2220/32 (2013.01); F05D 2240/12 (2013.01); F05D 2260/202 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An airfoil comprising:
a plurality of cooling paths through which cooling air flows; and
a first flow guide and a second flow guide disposed at a path connection part connecting adjacent cooling paths of the plurality of cooling paths to guide the flow of the cooling air, wherein the first flow guide is fixed to a pressure surface and the second flow guide is fixed to a suction surface,
wherein the first flow guide is connected from a downstream of a cooling path of the plurality of cooling paths to the path connection part, and the second flow guide is connected from the path connection part to an upstream of an adjacent cooling path of the plurality of cooling paths,
wherein the first flow guide and the second flow guide partially overlap with each other when viewed from a height direction of the airfoil; and
a leading end of the second flow guide is positioned radially outward compared to a trailing end of the first flow guide, the trailing end of the first flow guide is positioned radially outward compared to a trailing end of the second flow guide, and the trailing end of the second flow guide is positioned radially outward compared to a leading end of the first flow guide, all the radial positions being with respect to a center of a partition plate dividing the cooling path and the adjacent cooling path.