| 摘要 |
PROBLEM TO BE SOLVED: To provide a blade lattice of turbine rotor blade capable of restricting performance deterioration caused by corrosion of water droplets even after elapsing of long term from starting in operation.SOLUTION: Rotor blades of a blade lattice of turbine rotor blades comprise a plurality of rotor blades spaced apart from each other in a circumferential direction of a turbine rotor. Rotor blades have a base end side region 32 arranged at a turbine rotor side and a tip side zone 33 in which blade hight is higher than that in the base end side region 32. The tip side zone 33 is formed in such a way that it includes an apex blade height position 34 having a maximum value at the tip side zone 33 of lap rate ratio L/C that is a ratio between a lap rate L indicating an overlapping rate of adjoining rotor blades in their circumferential directions and a blade chord length C of the rotor blades, and the lap rate ratio is gradually decreased from the apex blade height position 34 toward a lower blade height and toward a higher blade height. |
