Patent ID: 8756936

Claim:
A turbine exhaust diffuser adjustment system for a gas turbine engine, comprising: at least one flowpath downstream of at least one turbine combustor; wherein the at least one flowpath is defined at least in part by a turbine casing forming an OD flowpath boundary; wherein the at least one flowpath is defined at least in part by a hub forming an ID flowpath boundary; a first flowpath reducer positioned in the at least one flowpath on the ID flowpath boundary, wherein the first flowpath reducer includes a downstream, radially outward point that extends radially outward further from the ID flowpath boundary than an upstream, radially outward point that is position upstream from the downstream, radially outward point; and wherein the first flowpath reducer is adjustable such that an angular position of a radially outer surface of the first flowpath reducer may be adjusted relative to the ID flowpath boundary, thereby enabling the flowpath to be changed during turbine operation.