On-line stall margin adjustment in a gas turbine engine

Details On-line stall margin adjustment in a gas turbine engine On-line stall margin adjustment in a gas turbine engine

1991-11-08

1992-11-24

Look, Edward K.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Plural diverse condition responsive

415 26, 415 30, 415 33, 415 47, 415 48, 415 49, 36443101, 36443102, F01B 2500, F01D 1700, F03B 1504

Patent

active

051658445

ABSTRACT:
The deflection angle of a gas turbine stator is adjusted in proportion to the difference between two parameters computed from N.sub.2 and TT2 using the same function generator. One parameter is a reference adjustment under standard conditions for measured N.sub.2 adjusted to sea level and standard temperature. The second parameter is an adjustment for actual altitude conditions. The parameters manifest the clearance between the engine case and the turbine blade tips.

REFERENCES:
patent: 3614253 (1971-10-01), Gaertner
patent: 4338061 (1982-07-01), Beitler et al.
patent: 4849895 (1989-07-01), Kervistin
patent: 4958289 (1990-09-01), Sum et al.

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