| 摘要 |
PROBLEM TO BE SOLVED: To suppress the usage of air for cooling while improving the durability of rotor blades of a gas turbine.SOLUTION: In a platform 61 of a rotor blade 50, a plurality of belly-side passages 72 extending from a blade air flow passage 71 continuous into a blade body 51 and the platform 61 to a circumferential belly side to open in a belly-side end surface 64 and aligning in an axial direction Da, a back-side mother passage 73 into which cooling air flows, and a back-side passage 74 communicating with the back-side mother passage 73 and extending from the back-side mother passage 73 along a back-side end surface 65 are formed. |
