Volume 35 Issue 9
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ZHOU Penghe, LIU Wenyi, LIU Weihua. Analysis on oxygen volume fraction control index in aircraft fuel tank inerting[J]. Journal of Aerospace Power, 2020, 35(9): 1856-1865. doi: 10.13224/j.cnki.jasp.2020.09.007
Citation: ZHOU Penghe, LIU Wenyi, LIU Weihua. Analysis on oxygen volume fraction control index in aircraft fuel tank inerting[J]. Journal of Aerospace Power, 2020, 35(9): 1856-1865. doi: 10.13224/j.cnki.jasp.2020.09.007
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Analysis on oxygen volume fraction control index in aircraft fuel tank inerting

doi: 10.13224/j.cnki.jasp.2020.09.007
  • 1.

    Key Laboratory of Aircraft Environment Control and Life Support of Ministry,of Industry and Information Technology,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

  • 2.

    Nanjing Engineering Institute of Aircraft Systems,Avation Industry Corporation of China,Limited,Nanjing 211106,China

  • Received Date: 2020-03-02
  • Publish Date: 2020-09-28
    Abstract
  • The current standard test methods for limiting oxygen volume fraction, theoretical and test research results on limiting oxygen volume fraction for aircraft fuel were systematically summarized, then some suggestions were presented by extensively drawing on previous research results: (1) When N2 inerting was adopted on the ground, 12% oxygen volume fraction can be used as the control index of oxygen volume fraction in the fuel tank for RP-3 fuel. (2) For civil aircraft, the control index of oxygen volume fraction in the fuel tank within the flight envelope can be determined, indicating that the limited oxygen volume fraction in the ullage of fuel tank at sea level through 3 048 m was approximately within 12%, with a linear increase from 12% at 3 048 m to approximately 145% at 12 192 m; for military aircraft, it can be considered to add a 20% safety margin on the civilian aircraft standard, the limited oxygen volume fraction increased linearly from 9% at sea level to 12% at 12 192 m. (3) At present, in the development of the inerting system of domestic military aircraft, the requirement of controlling the oxygen volume fraction in the ullage of fuel tank within 9% during the whole flight envelope was debatable, which would directly lead to excessive compensation loss caused by excessive protection.

     

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