VANE STRUCTURE HAVING IMPROVED COOLED OPERATION IN STATIONARY COMBUSTION TURBINES

摘要

A combustion turbine is provided with first stage vane structure having an airfoil portion or vane and inner and outer shrouds. The vane is formed from a spar which is covered by a shell having inner coolant channels which carry coolant for cooling the shell (vane) outer surface. The coolant is supplied through coolant channels in the spar, and a limited amount of the coolant is discharged to the hot gas path through the vane trailing edge while most of the coolant is directed to coolant channels within the shrouds for shroud coolant action and ultimate discharge to the hot gas path through shroud openings.