Patent ID: 6530745
Filing Date: 2003-03-11
Classification: F01D,F05D

Abstract:
A cooling system for gas turbine stator nozzles, comprising:a plurality of vanes forming a plurality of nozzles for a gas turbine; each said vane having a concave surface and an opposite convex surface which cooperate with one another to define the outer shape of the vane; said vane including a plurality of cooling holes in communication with a cooling medium within said vane and opening through said concave vane surface, each said cooling hole having an inlet section within said vane and an outlet section opening through said concave surface; said cooling hole having a cross-section variable in a radial direction, said inlet section having a height along a generally radial direction of said vane less than a height of the outlet section, a width of the inlet section being greater than a width of the outlet section, whereby a wall thickness between the cooling hole and the concave surface in the region of the outlet section is minimized.