Modulated gas turbine cooling air

Details Modulated gas turbine cooling air Modulated gas turbine cooling air

1992-04-17

1993-07-06

Bertsch, Richard A.

Power plants

Combustion products used as motive fluid

60 3975, F02G 300

Patent

active

052243320

ABSTRACT:
Cooling air to the 1-2 turbine stage seal is supplied in parallel with air to the second vane from a plenum. A modulatable valve in the supply line to the plenum regulates air flow in response to a sensed temperature in the 1-2 seal area at high sensed speeds. Valve and thermocouples are checked for proper operation. Immediate alerts and maintenance messages are established along with fail safe operating conditions upon fault detection. Over cooling of the seal area during low power operation, in anticipation of a power increase, is used to improve low cycle fatigue life of the turbine disk and seal runner.

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patent: 4815272 (1989-03-01), Laurello
patent: 4869640 (1989-09-01), Schwarz et al.
patent: 4893983 (1990-01-01), McGreehan
patent: 5022817 (1991-06-01), O'Halloran

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