초록 ▼

A control system for controlling the compressor stall margin during acceleration in a gas turbine engine includes means for sensing signals indicative of the gas flow temperature and gas pressure. The control system further includes signal processing means, responsive to the sensed signals, for synt

A control system for controlling the compressor stall margin during acceleration in a gas turbine engine includes means for sensing signals indicative of the gas flow temperature and gas pressure. The control system further includes signal processing means, responsive to the sensed signals, for synthesizing and providing a processed signal indicative of a measure of compressor destabilization due to heat transfer effects. The control system also includes means, responsive to the processed signal, for providing an output to initiate corrective action to increase compressor stall margin if needed. The engine control means, which is a part of the control system, increases the compressor stall margin by either adjusting the compressor variable vanes, reducing fuel flow or modulating the compressor bleed.

대표청구항 ▼

[ What is claimed is:] [1.] A control system for a gas turbine engine during transient engine conditions, the engine having a case formed of a metallic material, a compressor operating with a stall margin including rows of blades, and stator vanes both formed of a metallic material, comprising:input

[ What is claimed is:] [1.] A control system for a gas turbine engine during transient engine conditions, the engine having a case formed of a metallic material, a compressor operating with a stall margin including rows of blades, and stator vanes both formed of a metallic material, comprising:input means for sensing and providing sensed signals indicative of a temperature and pressure of a gas flowing through the compressor; andsignal processing means, responsive to the sensed signals, for calculating at least one rate of temperature change of the metallic materials in the compressor, for combining the at least one rate of temperature change with the mass of the metallic materials, and for normalizing the combination to the total gas enthalpy, to provide a processed signal indicative of a measure of compressor destabilization due to heat transfer effects, and for providing the processed signal to increase the compressor stall margin.