Approach to extending life of gas turbine engine

Details Approach to extending life of gas turbine engine Approach to extending life of gas turbine engine

2008-05-27

2008-05-27

Koczo, Jr., Michael (Department: 3746)

Power plants

Combustion products used as motive fluid

Process

Reexamination Certificate

active

07377115

ABSTRACT:
Methods of increasing lifetimes of components in a gas turbine engine. Ordinarily, components are replaced after they experience a certain number of thermal cycles, or a certain operating temperature limit is exceeded. Under one form of the invention, the components are not replaced at that time, but are subjected to increased cooling, which decreases the highest temperature reached in subsequent thermal cycles. Also, many components are replaced when acceleration of an engine falls below a target. In one form of the invention, the components are not replaced, but (1) scheduled fuel flow is increased and (2) compressor stall margin also increased, in order to attain the target acceleration.

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