Iris control for gas turbine engine air brake

Details Iris control for gas turbine engine air brake Iris control for gas turbine engine air brake

1977-08-08

1978-10-31

Halvosa, George E. A.

Power plants

Combustion products used as motive fluid

Multiple fluid-operated motors

188290, 251212, 415163, F02C 702

Patent

active

041226682

ABSTRACT:
A gas turbine engine of the two shaft free turbine type has a first gasifier turbine for driving a compressor to supply air to a combustor for combustion with fuel to produce motive fluid for driving the compressor turbine and a second free wheeling power turbine. An air brake with a compressor impeller directly coupled to the power turbine has an inlet and an exhaust and a close coupled iris throttle assembly for regulating the inlet flow of air into the compressor to obtain maximized power turn down ratios without aerodynamic instability.

REFERENCES:
patent: 3182759 (1965-05-01), Kelemen
patent: 3234902 (1966-02-01), Booth
patent: 3378117 (1968-04-01), Stacy
patent: 3399747 (1968-09-01), Westwell et al.
patent: 3982390 (1976-09-01), Bell

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