TURBINE BLADE-CASCADE END WALL

摘要

A turbine blade-cascade end wall which can suppress generation of swirl on the back of a turbine stator blade and can reduce secondary flow loss incident to the swirl. On the turbine blade-cascade end wall (10) located on the tip side of a plurality of turbine stator blades (B) arranged annularly, a pressure gradient relaxing means (11) for relaxing a pressure gradient being generated in the blade height direction on the back of the turbine stator blade (B) by a clearance leak flow leaked from the clearance between the tip of a turbine rotor blade located on the upstream side of the turbine stator blade (B) and a tip end wall arranged facing the tip of the turbine rotor blade is provided.