PISTON RING ASSEMBLY FOR A TURBINE ENGINE

摘要

A gas turbine engine is provided having a combustion section with a liner extending between a forward end and an aft end. A structural member is positioned in or around at least a portion of the combustion section. Additionally, a piston ring holder is provided attached to the structural member at a first end and positioned proximate to the aft end of the liner at a second end. The piston ring holder is a bimetallic member including a first portion formed of a first material and a second portion formed of a second material. A coefficient of thermal expansion of the first material is different than a coefficient of thermal expansion of the second material.

主权项

1. A gas turbine engine defining an axial direction, the gas turbine engine comprising:
a combustion section including a liner extending between a forward end and an aft end generally along the axial direction, the liner at least partially defining a combustion chamber; a structural member positioned in or around at least a portion of the combustion section; and a piston ring holder including a first end and a second end, the piston ring holder attached to the structural member at the first end and positioned proximate to the aft end of the liner at the second end, the piston ring holder further including a first portion comprised of a first material having a first coefficient of thermal expansion, αH1, and a second portion comprised of a second material having a second coefficient of thermal expansion, αH2, the first coefficient of thermal expansion, αH1, being different than the second coefficient of thermal expansion, αH2.