Power plants – Combustion products used as motive fluid – With safety device
Patent
1995-04-21
1999-06-29
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
With safety device
60 39141, F02C 726, F02C 926
Patent
active
059161264
ABSTRACT:
A fuel control system for a gas turbine engine having a staged combustor includes apparatus and methods to operate the combustor during pilot operation, staged operation, and transition between the two modes of operation. Various construction details are developed which provide a fuel control having a switch with built in hysteresis for determining the transition points between operating modes. In one embodiment, the combustor is switched from pilot to staged operation at a thrust level greater than the thrust level at which the combustor is switched from staged to pilot operation. During transitions between operating modes, the changes in fuel flows are limited by a plurality of rate limits to prevent combustor fuel spikes and blow-outs from occurring. During engine starts, the fuel lines to the main combustor are pre-filled to provide responsiveness during the transition from pilot to staged operation.
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Chin Teresa
Laudadio Nicola
Szillat John C.
Casaregola Louis J.
Cunningham Marina F
United Technologies Corporation
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