METHOD OF DIAGNOSTICS OF STALLING AND SURGING Russian patent published in 2010 - IPC F04D27/02 

FIELD: testing equipment.

SUBSTANCE: invention refers to methods of diagnostics of stalling and surging and may be used in the field of gas turbine engine-building in systems of automated control of aircraft gas turbine engines for diagnostics and prevention of stalling and surging. Technical result is achieved due to use, for diagnostics of stalling and surging, of parametres which simultaneous intensive change occurs only in case of surging, while upon change of engine operation mode complex change of these parametres does not occur. Method of diagnostics of stalling and surging includes: measurement of compressor delivery pressure and compressor rotary speed, calculation of value of compressor delivery pressure time derivative and its comparison to preset threshold value considering symbol. The new in this method is that additionally turbine outlet temperature is measured, value of ratio of turbine outlet temperature to compressor rotary speed is calculated and compared to threshold value. In case of simultaneous excess of threshold values by value of compressor delivery pressure time derivative and ratio of turbine outlet temperature to compressor rotary speed, stalling and surging is considered to occur.

EFFECT: exclusion of possibility of false conclusions obtainment about presence of stalling and surging of aircraft gas turbine engine.

5 dwg