| 摘要 |
This turbine is provided with: a blade; a structure which is provided on the tip side of the blade with a clearance therebetween and rotates relatively to the blade; a step part which is provided at the tip of the blade, has at least one step surface, and protrudes toward a region facing the tip in the structure; a seal fin which is provided in the region facing the tip in the structure, extends to the step part, and forms a very small clearance between the step part and itself; and a cut part which is formed in the step surface so as to be continuous with the upper surface of the step part. The cut part guides a separation vortex separated from the mainstream of a fluid flowing through the clearance to the seal fin on the upper surface of the step part. |
