Compressor surge prevention digital system

摘要

Methods and devices for anticipating a surge in a gas turbine engine. Controlled pressure signal(s) may be compared with reference pressure signal(s), each of the controlled pressure signal(s) and reference pressure signal(s) having an associated time value. If the controlled pressure signal(s) are less than the reference pressure signal(s), a controlled pressure curve may be fitted through a predetermined number of points based on the controlled pressure value(s) and associated time value(s). A reference pressure curve may be fitted through the predetermined number of points based on the reference pressure value(s) and associated time value(s). A time to compressor surge may be estimated based on an intersection of the controlled pressure curve and the reference pressure curve.

主权项

1. A method for anticipating a compressor surge in a gas turbine engine comprising one or more bleed valves, the method comprising:
comparing at a signal processor one or more controlled pressure signal values and one or more reference pressure signal values, each of the one or more controlled pressure signal values and the one or more reference pressure signal values having an associated time value; and when the one or more controlled pressure signal values are less than the one or more reference pressure signal values, at the same or another signal processor:
fitting a controlled pressure curve through a predetermined number of points based on the one or more controlled pressure signal values and associated time values;fitting a reference pressure curve through a predetermined number of points based on the one or more reference pressure signal values and associated time values; andestimating a time to the compressor surge based on an intersection of the controlled pressure curve and the reference pressure curve; generating one or more control signals useful for controlling the one or more bleed valves to reduce pressure proximate to a compressor of the gas turbine; and controlling the one or more bleed valves based on the one or more control signals.