CONVERGING FLOW JOINT INSERT SYSTEM AT AN INTERSECTION BETWEEN ADJACENT TRANSITIONS EXTENDING BETWEEN A COMBUSTOR AND A TURBINE ASSEMBLY IN A GAS TURBINE ENGINE

摘要

A transition duct system for routing a gas flow from a combustor to the first stage of a turbine section in a combustion turbine engine, wherein the transition duct system includes one or more converging flow joint inserts forming a trailing edge at an intersection between adjacent transition ducts is disclosed. The transition duct system may include a transition duct having an internal passage extending between an inlet to an outlet and may expel gases into the first stage turbine with a tangential component. The converging flow joint insert may be contained within a converging flow joint insert receiver and disconnected from the transition duct bodies by which the converging flow joint insert is positioned. Being disconnected eliminates stress formation within the converging flow joint insert, thereby enhancing the life of the insert. The converging flow joint insert may be removable such that the insert can be replaced once worn beyond design limits.

主权项

1. A transition duct system for routing gas flow in a combustion turbine subsystem that includes a first stage blade array having a plurality of blades extending in a radial direction from a rotor assembly for rotation in a circumferential direction, the circumferential direction having a tangential direction component, an axis of the rotor assembly defining a longitudinal direction, and at least one combustor located longitudinally upstream of the first stage blade array and located radially outboard of the first stage blade array, the transition duct system, comprising:
a first transition duct body having an internal passage extending between an inlet and an outlet; wherein the outlet of the first transition duct body is offset from the inlet in the longitudinal direction and the tangential direction; wherein the outlet of the first transition duct body is formed from a radially outer side generally opposite to a radially inner side, and the radially outer and inner sides are coupled together with opposed first and second side walls; a second transition duct body having an internal passage extending between an inlet and an outlet; wherein the outlet of the second transition duct body is offset from the inlet in the longitudinal direction and the tangential direction; wherein the outlet of the second transition duct body is formed from a radially outer side generally opposite to a radially inner side, and the radially outer and inner sides are coupled together with opposed first and second side walls; wherein a first side of the first transition duct body intersects with a second side of the second transition duct body forming a converging flow joint; and a converging flow joint insert extending through an outer wall and positioned at a downstream end of the converging flow joint to form a trailing edge of the converging flow joint.