INTERRUPTED CIRCUMFERENTIAL GROOVE STATOR STRUCTURE

摘要

A stator structure such as the fan casing (34) of a gas turbine engine extending circumferentially about an array of rotor blades is disclosed. Various construction details which increase the surge margin of the construction with a minimal impact on aerodynamic efficiency are developed. In one particular embodiment, the fan casing has a groove region (62) which extends radially outwardly of the mid-chord region (58) of the blades. The groove region has a plurality of circumferentially extending grooves (38) which are interrupted in a circumferential direction by a plurality of dams (42).