| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbine blade for impingement cooling, capable of reducing crossflow, actively controlling a flow of a cooling medium, and efficiently recovering the cooling medium.SOLUTION: A stator blade 10 includes: a blade wall 11; and an insert 15. The insert 15 is provided opposed to an internal surface of the blade wall 11, and includes an outer insert plate 22 including holes 23 at position opposed to the blade wall 11, an inner insert plate 21 provided opposed to the outer insert plate 22 on an opposite side to the blade wall 11, and hollow bridges 25 coupling the inner insert plate 21 to the outer insert plate 22. Openings 24 communicating a space between the blade wall 11 and the outer insert plate 22 with a space in contact with a surface of the inner insert plate 21 on an opposite side to the outer insert plate 22 are provided to pass through the respective hollow bridges 25. Each opening 24 is located between the two rows of holes 23. A cooling medium supplied to the space between the inner insert plate 21 and the outer insert plate 22 is injected from the holes 23 to the internal surface of the blade wall 11. |
