Compressor hub

摘要

Cantilevered stator vanes (46) of the compressor section of a gas turbine engine are treated by providing a rotary hub (48) with a bypass passage (56) for removing the low momentum fluid from the main air stream adjacent to the tips of the stator vanes in the compressor and returning it back into the main air stream after having treated the air while avoiding penalties and excessive heating. A plurality of vanes (66) are circumferentially spaced in the bypass passage (56) to remove vortices and streamlining the flow before injecting the air back into the airstream. The hub is fabricated in a single cast piece in one embodiment, in a three ring configuration in another embodiment and in a segmented ring configuration in still another embodiment.