초록 ▼

A stator assembly for reducing noise in the outermost portion of the working medium flow path is disclosed. Various construction details are developed which relate to the reduction in noise within the outer twenty percent (20%) of the working medium flow path. In one particular embodiment, an annula

A stator assembly for reducing noise in the outermost portion of the working medium flow path is disclosed. Various construction details are developed which relate to the reduction in noise within the outer twenty percent (20%) of the working medium flow path. In one particular embodiment, an annular channel extends rearwardly from a location between the blades and the vanes for capturing a significant portion of the wake turbulent flow from the tip region of the rotor blades. The annular channel is bounded by a pair of circumferentially extending walls, at least one of which has acoustic treatment to absorb tonal and broadband noise.

대표청구항 ▼

[ What is claimed is:] [1.] A stator assembly for a gas turbine engine having an axis of rotation A.sub.r, a flow path for working medium gases disposed about the axis of rotation, a first outer wall extending circumferentially about the axis of rotation and outwardly bounding the flow path for work

[ What is claimed is:] [1.] A stator assembly for a gas turbine engine having an axis of rotation A.sub.r, a flow path for working medium gases disposed about the axis of rotation, a first outer wall extending circumferentially about the axis of rotation and outwardly bounding the flow path for working medium gases, an array of rotor blades having an axial location, each rotor blade extending radially outwardly across the flow path and having a tip region such that the tip region is in close proximity with the outer wall, an array of stator vanes spaced axially downstream from the array of rotor blades, each stator vane extending radially inwardly across the flow path, a second wall extending axially to split the flow path into a first annular channel and a second annular channel, the second wall being spaced radially inwardly from the first outer wall leaving the first channel therebetween, the first channel being outwardly bounded by the first outer wall and inwardly bounded by the second wall, the second wall being integrally attached to the stator vanes, said stator assembly characterized by:the first channel extending axially from an axial location that is disposed between an axial location between the blades and vanes and said channel extending radially and circumferentially and disposed entirely within the outermost twenty percent (20%) of the working medium flow path,wherein at least one of said walls bounding the annular channel has sound absorbing structure disposed therein,and wherein the outer wall and the second wall of the channel capture turbulent flow discharged into the outer portion of the flow path from the tip region of the rotor blades, for absorbing acoustic energy from the gases passing through the channel as the turbulent gases impinge on the surfaces of the first outer wall and the second wall.