Apparatus for improving acceleration in a multi-shaft gas turbine engine
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United States of America Patent
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Feb 3, 1987
Issued Date -
N/A
app pub date -
Jan 8, 1986
filing date -
Jan 27, 1984
priority date (Note) -
Expired
status (Latency Note)
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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.
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