Patent ID: 6068445
Filing Date: 2000-05-30
Classification: F01D,F05D

Abstract:
A cooling system for the leading-edge region of a hollow gas-turbine blade, comprising:a hollow blade including a blade body, a blade root, a blade tip, a leading edge having a radiused portion, a suction side, a pressure side, a web connecting the pressure side to the suction side, a duct through which a cooling medium can be caused to longitudinally flow from the blade root to the blade tip, the duct being defined in the blade body by the inner walls of the leading edge, the suction side, the pressure side and the web, the inner walls of both the suction side and the pressure side being provided with a plurality of ribs which run slantwise and at least approximately in parallel, the suction-side ribs and the pressure-side ribs being alternatingly and longitudinally offset from one another, wherein each of the ribs includes a first portion which runs from the web in the direction of the leading edge and a second portion which merges into the first portion in the region of the leading edge, the second portion extending around the leading edge radiused portion.