The on-board measured parameters including high pressure rotor speed

low pressure rotor speed and engine inlet total pressure were used to establish the flameout on-line detection method based on the corrected change rates of these physical speeds. According to engine states modulations in the whole envelop and engine tests

the amplitude of change rates of high and low pressure rotor speeds in flame out process was 1.5-5.0 times that in deceleration and surge process

the amplitude of change rate of high pressure rotor speed in high pressure shaft fracture process was 6.0-10.0 times that in flameout process

and the amplitude of change rate of low pressure rotor speed in low speed pressure shaft frac-ture process was 2.0-3.5 times that in flameout process. With these properties

the detection method could clearly distinguish flameout process from other transient processes such as deceleration

surge and shaft fracture. Being verified in engine tests

the detection time was 0-0.3s

the detection rate of this method was 100%

and no false or missed detection had been found.