Patent ID: 6539627
Filing Date: 2003-04-01
Classification: F01D,F05D,Y10T

Abstract:
A method of forming a turbulated cooling hole in a component for use in a gas turbine engine, the component including a body having an exterior surface mountable in the gas turbine engine so that the exterior surface is exposed to gases flowing through the flow path of the engine, said method comprising the steps of:forming a hole in the body of the component, said hole being defined by an elongate annular surface extending through the body of the component and terminating at the exterior surface of the body; positioning a mandrel in the hole formed in the component, the mandrel having a length and a cross-sectional shape which varies along the length in a predetermined manner; permanently deforming the body toward the mandrel to reduce a distance between the elongate annular surface defining the hole and the mandrel; and removing the mandrel from the hole of the deformed component thereby to provide a turbulated hole having a cross section which varies along a length of the annular surface defining the hole.