TURBINE BLADE CASCADE STRUCTURE AND COOLING METHOD OF TURBINE BLADE CASCADE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a turbine blade cascade structure for establishing technique for blade cascade cooling to respond to future temperature increase, and a cooling method for the turbine blade cascade structure.;SOLUTION: An appropriate face 17 for performing wall-face flowing of a cooling air flow flowing out in the centrifugal direction from an annular gap 12 between an upstream side of a stationary blade cascade ring 1 and a downstream side of a moving blade cascade ring 2 is formed. The appropriate face 17 is formed to have a curved face with respect to a reference face 18. The cooling air flow uniformizes temperature distribution on a shroud surface and suppresses generation of a secondary flow.;COPYRIGHT: (C)2006,JPO&NCIPI