AXIAL FLOW MACHINE COOLING SYSTEM

摘要

This invention concerns a system for cooling components in a gas turbine engine, the gas turbine engine including a compressor for driving a primary gas flow to a combustor and a turbine arranged to be driven by combustion gases from the combustor, wherein the system includes: an annular cooling flow passage arranged for fluid communication between the compressor and the turbine, the flow passage having a first inlet arranged to receive gas from the primary gas flow downstream of compressor, and a second inlet located upstream of the first inlet, wherein the annular cooling flow passage has at least one internal wall for guiding airflow from the first inlet towards the airflow from the second inlet, the airflow from the first and second inlets coalesce within the annular flow passage prior to passing along the passage in a direction from the compressor to the turbine.

主权项

1. A system for cooling components in a gas turbine engine, the gas turbine engine comprising a compressor for driving a primary gas flow to a combustor and a turbine arranged to be driven by combustion gases from the combustor, wherein the system comprises:
an annular cooling flow passage arranged for fluid communication between the compressor and the turbine, the flow passage having a first inlet arranged to receive gas from the primary gas flow downstream of the compressor, and a second inlet located upstream of the first inlet, wherein the annular cooling flow passage has at least one internal wall for guiding an airflow from the first inlet towards an airflow from the second inlet, such that the airflow from the first and second inlets coalesce within the annular flow passage and towards the compressor end of the annular flow passage, prior to passing along the flow passage in a direction from the compressor to the turbine, and wherein the annular flow passage comprises first and second outer walls, the first outer wall comprising a shaft arranged for rotation in use and the second outer wall being disposed at a greater radial distance from an axis of the annular flow passage than the first outer wall, and wherein the internal wall is arranged to direct flow from at least the first inlet onto the first outer wall.