Angled cooling air bypass slots in honeycomb seals

摘要

A labyrinth seal having a static honeycomb land and a toothed rotary land, an angled passage is formed in the honeycomb land to communicate cooling air from the static vane region of the interstage HP section of the turbine into the aft cavity which is bounded by the rotating stage two blade whereby the exiting cooling air will acquire a velocity component which is in the same direction as the rotating stage two blade.