EXHAUST FRAME COOLING VIA STRUT COOLING PASSAGES

摘要

A system is provided including a turbine exhaust section. The turbine exhaust section includes an exhaust flow path. The turbine exhaust section also includes an outer structure having an outer casing, an outer exhaust wall disposed along the exhaust flow path, and an outer cavity disposed between the outer exhaust wall and the outer casing. The turbine exhaust section further includes an inner structure having an inner exhaust wall disposed along the exhaust flow path, a bearing cavity disposed between the inner casing and a bearing housing. In addition, the turbine exhaust section includes a strut extending between the outer structure and the inner structure. The strut includes a first flow passage configured to flow a fluid from the bearing cavity to the outer cavity. The flow of fluid is thermally insulated from the strut.

主权项

1. A system for a gas turbine, comprising:
a turbine exhaust section, including:
an exhaust flow path;an outer structure including an outer casing, an outer exhaust wall disposed along the exhaust flow path, and an outer cavity disposed between the outer exhaust wall and the outer casing;an inner structure including an inner exhaust wall disposed along the exhaust flow path, and a bearing cavity disposed between the inner casing and a bearing housing;a strut extending between the outer structure and the inner structure, the strut including an inner body that is load bearing and an outer body, the strut including a first flow passage configured to convey a first flow of fluid from the bearing cavity to the outer cavity; anda thermal barrier between the inner body of the strut and the first flow to thermally insulate the first flow from the inner body.