Controlling stall margin in a gas turbine engine during accelera

Details Controlling stall margin in a gas turbine engine during accelera Controlling stall margin in a gas turbine engine during accelera

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, A01B 2500, F01D 1700, F03B 1504

Patent

active

051658453

ABSTRACT:
Stall margin in a gas turbine compressor is controlled during acceleration by synthesizing the thermal enlargement of critical compressor stages to synthesize the temporary increase in blade-case clearance during acceleration. The change in clearance is used to produce an augmenting stator vane deflection signal which is summed with a steady state vane deflection signal to increase deflection during acceleration until the clearance returns to a nominal level when the expansion of the compressor parts stabilize.

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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