Systems, methods, and apparatus for passive purge flow control in a turbine

摘要

Systems, methods and apparatus for passive purge flow control in a turbine are provided. Various embodiments of the invention include providing a path for air to flow to a bore of a rotor with a plurality of stacked wheels. The air flow path includes at least one inlet hole on a rotor structure and a plurality of holes in at least some of the stacked wheels. The method further involves control of air flow to the at least one inlet hole based at least in part on axial deflection between the rotor and an associated stator during the gas turbine operation. Additionally, a portion of the air flowing into the inlet hole is directed through the plurality of holes in the at least some of the stacked wheels to purge the rotor.