System and method for lean blowout protection in turbine engines
AssigneeHoneywell International Inc.
InventorsTom G. Mulera, Tim Belling, Shane R. Smith
Life of this patent
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Abstract
A lean blowout protection system and method is provided that facilitates improved lean blowout protection while providing effective control of turbine engine speed. The lean blowout protection system and method selectively and gradually biases the lean blowout (LBO) schedule based on current engine data. This facilitates improved lean blowout protection while providing effective control of turbine engine speed and temperature.
Claims20
A lean blowout protection system for reducing a probability of lean blowout in a turbine engine, the system comprising:
- an LBO schedule mechanism, the LBO schedule mechanism adapted to receive engine data and generate an initial LBO value;
- and
- an LBO bias mechanism, the LBO bias mechanism adapted to receive engine data and selectively provide a bias to the initial LBO value to generate an LBO schedule, the LBO bias mechanism adapted to selectively gradually increase and selectively gradually decrease the bias in response to the engine data.
A program product comprising:
- a) a lean blowout protection program for reducing a probability of lean blowout in a turbine engine, the lean blowout protection program including:
- an LBO schedule mechanism, the LBO schedule mechanism adapted to receive engine data and generate an initial LBO value;
- and
- an LBO bias mechanism, the LBO bias mechanism adapted to receive engine data and selectively provide a bias to the initial LBO value to generate an LBO schedule, the LBO bias mechanism adapted to selectively gradually increase and selectively gradually decrease the bias in response to the engine data;
- and
- b) computer-readable signal bearing media bearing said program.
A lean blowout protection system for reducing a probability of lean blowout in a turbine engine, the system comprising:
- an LBO schedule mechanism, the LBO schedule mechanism adapted to receive engine data and generate an initial LBO value;
- and
- an LBO bias mechanism adapted to receive engine data and selectively provide a bias to the initial LBO value to generate an LBO schedule, the LBO bias mechanism further adapted to:
- increase the bias to a specified maximum bias level in response to a commanded fuel flow being greater than the LBO schedule by a specified margin;
- decrease the bias until the bias reaches zero in response to the commanded fuel flow being below the LBO schedule plus the specified margin;
- and
- decrease the bias until the bias reaches zero in response to the engine data indicating an engine speed within a specified percentage of a startup engine speed.
Dependencies are inferred from the claim text.