| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce an oscillation generation potential of a rotor blade resulting from a shock wave at the upstream side of the rotor blade in a steam turbine rotor blade cascade in which wet steam flows at supersonic flow speed.SOLUTION: A steam turbine rotor blade 1 in which a Mach number of steam flowing into the steam turbine rotor blade 1 exceeds 1.0 in a partial range in a blade height direction, is configured so that vortex generators 12 are each provided on a blade pressure surface 9 at a blade height position at which the Mach number of steam flowing into the steam turbine rotor blade 1 exceeds 1.0 near a blade front edge with respect to a point of intersection between a perpendicular to the blade pressure surface 9 from a front edge tip end of an adjacent blade 1 provided adjacent to the steam turbine rotor blade 1 on a blade pressure surface 9-side and the blade pressure surface 9.</p> |
