Volume 36 Issue 7
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WANG Yudong. On-line detection method of flameout in turbofan engine[J]. Journal of Aerospace Power, 2021, 36(7): 1406-1416. doi: 10.13224/j.cnki.jasp.20200432
Citation: WANG Yudong. On-line detection method of flameout in turbofan engine[J]. Journal of Aerospace Power, 2021, 36(7): 1406-1416. doi: 10.13224/j.cnki.jasp.20200432
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On-line detection method of flameout in turbofan engine

doi: 10.13224/j.cnki.jasp.20200432

  • Commercial Aircraft Engine Company Limited, Aero Engine Corporation of China, Shanghai 200241, China

  • Received Date: 2020-10-16
  • Publish Date: 2021-07-28
    Abstract
  • 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.

     

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