Patent ID: 7422415
Filing Date: 2008-09-09
Classification: F01D,F05D,Y02T

Abstract:
1. An airfoil disposed in a row of airfoils in a steam turbine for removing moisture from a flow path of the steam turbine, wherein the airfoil has first and second longitudinal ends and an outer peripheral wall extending therebetween, said outer peripheral wall defining an airfoil leading edge, an airfoil trailing edge, a generally concave side face and a generally convex side face, at least one moisture extraction bore defined to extend along a portion of the length of said airfoil and having at least one inlet opening in flow communication with a steam path extending passed said airfoil row and between adjacent airfoils, and at least one steam injection bore defined to extend along a portion of the length of said airfoil axially downstream of at least one said moisture extraction bore and including at least one exit opening for steam injection into said steam path.