Gas turbine engine having a gap between an outlet guide vane and an inner wall surface of a diffuser

摘要

A gas turbine engine is provided, which comprises an outlet guide vane provided downstream of a compressor; an outer casing supporting a radially outward part of the outlet guide vane; and an inner diffuser supporting a radially inward part. The outlet guide vane includes a radially inward inner flange; a projecting part projecting radially inward from the inner flange; and an engagement part protruding to one side in an axial direction of the projecting part. The inner diffuser includes a smaller-diameter part having a smaller outer diameter than the other part located upstream. The inner diffuser is provided with an engagement groove extending to one side in the axial direction from an outer peripheral surface of the smaller-diameter part or a region in the vicinity thereof. The engagement part is inserted into the engagement groove with a gap between the engagement part and groove.

主权项

1. A gas turbine engine comprising:
an outlet guide vane downstream of a compressor; an outer casing supporting a radially outward part of the outlet guide vane; and an inner diffuser supporting a radially inward part of the outlet guide vane; wherein the outlet guide vane includes: a radially inward inner flange; a projecting part projecting radially inward from the inner flange; and an engagement part protruding to one side in an axial direction from a foreside of the projecting part; wherein the inner diffuser includes a smaller-diameter part having a smaller outer diameter than a part adjacent to the smaller-diameter part; wherein the inner diffuser is provided with an engagement groove extending to the one side in the axial direction from an outer peripheral surface of the smaller-diameter part or a region in the vicinity of the outer peripheral surface of the smaller-diameter part; wherein the engagement part is inserted into the engagement groove with a gap between the engagement part and the engagement groove; wherein a last-stage stator vane of the compressor is upstream of the outlet guide vane; wherein the outer casing supports a radially outward part of the stator vane; wherein the inner diffuser supports a radially inward part of the stator vane; wherein the stator vane includes:
a radially inward stator vane inner flange;a projecting part projecting radially inward from a foreside of the stator vane inner flange; anda stator vane engagement part protruding to a downstream side from the projecting part; wherein the inner diffuser includes an engaged part at a foreside of the smaller-diameter part and protruding forward; and wherein the engaged part is between the stator vane engagement part and the stator vane inner flange.