TURBINE BLADE-CASCADE END WALL

摘要

Provided is a turbine blade cascade endwall that is capable of suppressing a vortex generated on a suction surface of a turbine stator blade and that is capable of reducing secondary-flow loss due to this vortex. A turbine blade cascade endwall (10) that is positioned on a tip side of a plurality of turbine stator blades (B) arranged in a ring form is provided with a pressure gradient alleviating part (11) that alleviates a pressure gradient generated in the blade height direction at a suction surface of the turbine stator blades (B) due to a clearance leakage flow, leaking out of a gap between a tip of a turbine rotor blade located on the upstream side of the turbine stator blades (B) and a tip endwall disposed facing the tip of this turbine rotor blade.