Low flow correction for gas turbine engine fuel valve characteristics

摘要

A method for controlling a gas turbine engine fuel control valve during low flow conditions includes positioning the fuel control valve in an operating position. The method also includes determining a fuel control valve flow sensor flow rate while in the operating position and determining a corrected effective flow area (“Cda”) of the fuel control valve. The method further includes generating Cda versus command data with the corrected Cda and the operating position and inserting the generated Cda versus command data into the nominal Cda versus command data set when nominal Cda versus command data is not known at the operating position.

主权项

1. A method for controlling a gas turbine engine fuel control valve during low flow conditions, the method comprising:
modifying a nominal effective flow area versus command data set to a corrected effective flow area versus command data set of the fuel control valve including
positioning the fuel control valve in an operating position,determining a flow rate with a flow sensor when the fuel control valve is in the operating position,determining a corrected effective flow area of the fuel control valve in the operating position,generating effective flow area versus command data based on the corrected effective flow area of the fuel control valve and the operating position of the fuel control valve, andinserting the generated effective flow area versus command data into the nominal effective flow area versus command data set when nominal effective flow area versus command data within the nominal effective flow area versus command data set is not known at the operating position; and using the corrected effective flow area versus command data set to position the fuel control valve.