Abstract: A turbine blade having cooling holes formed therein and a turbine including the same are provided. The turbine blade includes an airfoil having a leading edge and a trailing edge formed thereon and a cooling passage defined for flow of a cooling fluid therethrough, and a cooling hole configured to communicate between the cooling passage and outside in the airfoil and having an inlet and an outlet, wherein the cooling hole includes an expanded portion and a grooved portion formed in the outlet, the grooved portion being recessed from the expanded portion toward the trailing edge.

Abstract: A turbine blade having cooling holes formed therein and a turbine including the same are provided. The turbine blade includes an airfoil having a leading edge and a trailing edge formed thereon and a cooling passage defined for flow of a cooling fluid therethrough, and a cooling hole configured to communicate between the cooling passage and outside in the airfoil and having an inlet and an outlet, wherein the cooling hole includes an expanded portion and a grooved portion formed in the outlet, the grooved portion being recessed from the expanded portion toward the trailing edge.

Abstract: An airfoil, a turbine, and a gas turbine having enhanced cooling performance are provided. The airfoil including a leading edge and a trailing edge may include: a first cooling passage connected to the leading edge; a second cooling passage connected to the trailing edge; a third cooling passage formed between the first cooling passage and the second cooling passage; a plurality of partitions provided in the second cooling passage and configured to partition the second cooling passage into a plurality of portions in a height direction of the second cooling passage; and a perforated plate extending in the height direction of the second cooling passage, and coupled with the partitions to support the partitions.

Abstract: An airfoil, a turbine and a gas turbine having enhanced cooling performance are provided. The airfoil including a leading edge and a trailing edge may include: a first cooling passage connected to the leading edge; a second cooling passage connected to the trailing edge; a third cooling passage formed between the first cooling passage and the second cooling passage; a shock tube installed in the first cooling passage and configured to form an auxiliary cooling passage between the shock tube and the leading edge, and to include a plurality of dispersion hole in the shock tube; and a flow guide member installed on the shock tube and configured to guide a flow of air that is drawn from the third cooling passage into the first cooling passage.

Abstract: An airfoil, a turbine and a gas turbine having enhanced cooling performance are provided. The airfoil including a leading edge and a trailing edge may include: a first cooling passage connected to the leading edge; a second cooling passage connected to the trailing edge; a third cooling passage formed between the first cooling passage and the second cooling passage; a shock tube installed in the first cooling passage and configured to form an auxiliary cooling passage between the shock tube and the leading edge, and to include a plurality of dispersion hole in the shock tube; and a flow guide member installed on the shock tube and configured to guide a flow of air that is drawn from the third cooling passage into the first cooling passage.

Abstract: An airfoil, a turbine, and a gas turbine having enhanced cooling performance are provided. The airfoil including a leading edge and a trailing edge may include: a first cooling passage connected to the leading edge; a second cooling passage connected to the trailing edge; a third cooling passage formed between the first cooling passage and the second cooling passage; a plurality of partitions provided in the second cooling passage and configured to partition the second cooling passage into a plurality of portions in a height direction of the second cooling passage; and a perforated plate extending in the height direction of the second cooling passage, and coupled with the partitions to support the partitions.