Method and apparatus for improving acceleration in a multi-shaft

Details Method and apparatus for improving acceleration in a multi-shaft Method and apparatus for improving acceleration in a multi-shaft

1984-01-27

1986-05-27

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 3929, F02C 916

Patent

active

045907595

ABSTRACT:
A free turbine, gas turbine engine provided with a pre-swirl arrangement in the compressor, based on bleeding air from the compressor and using the bleed air as a pre-swirl device upstream of the compressor to increase its rotational speed. A governor device, driven from the compressor rotor, controls the amount of pre-swirl bleed air to maintain a constant compressor speed from minimum to maximum power. Compressor rotor and gas inertia effects during acceleration are thus eliminated.

REFERENCES:
patent: 3643675 (1972-02-01), Wetterstad
patent: 3657881 (1972-04-01), Amann et al.
patent: 3751909 (1973-08-01), Kohler et al.
patent: 4222703 (1980-09-01), Schaum et al.
"The Use of Compressor-Inlet Pre-swhirl for the Control of Small Gas Turbines," No. 63-AHGT-55, published Jan. 14, 1963.

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