Patent ID: 6887033
Filing Date: 2005-05-03
Classification: F01D,F05D

Abstract:
1. A nozzle segment for a turbine having an axis, comprising: inner and outer platforms and at least one nozzle vane extending therebetween, said platforms having side edges extending generally parallel to the axis; a cooling system for at least one of said platforms including a source of a cooling medium, a first elongated plenum extending along at least one of the side edges of said one platform, a plurality of inlet passages in communication between said source and said plenum at spaced locations along said plenum, a plurality of outlet passages in communication with said plenum at spaced locations along said plenum and having outlet openings through said one side edge of said one platform at spaced locations therealong, and passageways in communication with said plenum and a plurality of film cooling holes disposed along a surface of said one platform for supplying the cooling medium along and film cooling said platform surface; said inlet passages, said outlet passages and said passageways being arranged such that said inlet passages do not have direct line-of-sight flow of the cooling medium into the outlet passages and said passageways.