Patent ID: 6190127
Filing Date: 2001-02-20
Classification: F01D

Abstract:
In a gas turbine having a pair of parts responsive to different applied temperatures creating a transient thermal mismatch, said turbine including a turbine rotor wheel for mounting buckets and an adjoining wheel having a rabbeted joint between registering faces thereof, a method of maintaining the thermal mismatch between said parts within a predetermined thermal mismatch, comprising the steps of:flowing a fluid medium along a surface of one of said parts to either heat or cool said one part to a temperature enabling the magnitude of the thermal mismatch of said parts to lie within said predetermined thermal mismatch; andflowing the fluid medium along a face of the adjoining wheel axially remote from the turbine rotor wheel to reduce the thermal mismatch to within said predetermined thermal mismatch to preclude relative displacement of elements forming the rabbeted joint.