GAS TURBINE ENGINE MID-TURBINE FRAME CONFIGURATION

摘要

A gas turbine engine includes a core flow path that extends axially about an engine axis. A turbine section is arranged in the core flow path. A mid-turbine frame includes multiple circumferentially spaced vanes that extend radially between and interconnect inner and outer flow path surfaces that define a portion of the core flow path. The vanes and inner and outer flow path surfaces are provided by a unitary, one-piece cast structure. The inner flow path surface provides inlet and exit inner diameters relative to the engine axis. The outer flow path surface provides inlet and exit outer diameters relative to the engine axis. The inner flow path surface extends an axial length from the inlet inner diameter to the exit inner diameter. A ratio of the exit outer diameter to the axial length is greater than 3.0 to 1.

主权项

1. A gas turbine engine comprising:
a core flow path extending axially about an engine axis; a turbine section that is arranged in the core flow path, the turbine section includes a high pressure turbine and a low pressure turbine that is arranged downstream from the high pressure turbine; a mid-turbine frame arranged in the core flow path between the high and low pressure turbines, the mid-turbine frame includes multiple circumferentially spaced vanes that extend radially between and interconnect inner and outer flow path surfaces that define a portion of the core flow path, the vanes and inner and outer flow path surfaces provided by a unitary, one-piece cast structure, the inner flow path surface provides inlet and exit inner diameters relative to the engine axis, and the outer flow path surface provides inlet and exit outer diameters relative to the engine axis, the inner flow path surface extends an axial length from the inlet inner diameter to the exit inner diameter; and a ratio of the exit outer diameter to the axial length greater than 3.0 to 1.