Power plants – Combustion products used as motive fluid
Patent
1998-08-18
2000-11-07
Thorpe, Timothy S.
Power plants
Combustion products used as motive fluid
60 3929, 701100, F02C 1310
Patent
active
061419516
ABSTRACT:
A control system for operating a compressor bleed valve in a gas turbine engine to prevent compressor operation in surge region determines engine stability in response to a plurality of sensed engine parameters, and calculates and stores engine parameters to estimate compressor performance relative to a stability limit which is indicative of a surge operation. The control system further maintains a rolling average of the estimate of compressor performance for up to a predetermined number of engine flights. This rolling average of the estimate of compressor performance is indicative of engine usage and associated engine degradation. The control system determines a bias for the bleed valve in response to calculated engine parameters and adjusts the operation of the bleed valve in response to the compressor performance so as not to exceed the stability limit.
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Doherty, Jr. Stephen P.
Kratz Merrill L.
Krukoski Leon
Laudadio Nicola
Gartenberg Ehud
Krasinski Monica G.
Thorpe Timothy S.
United Technologies Corporation
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