Volume 27 Issue 12
Dec.  2012
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WANG Xue-de, WANG Zhi-wei, LIU Wei-hua, ZHANG Sheng-qi, WANG Xiao-ping. Numerical simulation and analysis of nitrogen-enriched air flow in a center wing tank[J]. Journal of Aerospace Power, 2012, 27(12): 2641-2647.
Citation: WANG Xue-de, WANG Zhi-wei, LIU Wei-hua, ZHANG Sheng-qi, WANG Xiao-ping. Numerical simulation and analysis of nitrogen-enriched air flow in a center wing tank[J]. Journal of Aerospace Power, 2012, 27(12): 2641-2647.
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Numerical simulation and analysis of nitrogen-enriched air flow in a center wing tank

  • 1.

    School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

  • 2.

    College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • 3.

    Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing Engineering Institute of Aircraft System, Nanjing 211100, China

  • Received Date: 2011-12-22
  • Publish Date: 2012-12-28
    Abstract
  • Under the different nitrogen-enriched air(NEA) parameters, the inerting process was studied by numerical simulation of a civil airplane center wing tank(CWT). The study show the inerting rule of the CWT under different flow rates and different oxygen concentration. The results show that, when the NEA containing volume fraction of about 95% of the nitrogen and the volume flow rate of the NEA are 0.021, 0.028m3/s and 0.042m3/s, the average oxygen volume fraction distribution versus volumetric tank exchange (VTE) are almost the same; when the volume flow rate of the NEA is 0.042 m3/s and the volume fraction of the nitrogen are 92%, 94% and 98%, the inerting ratio versus time are the same. It is conclusion that the inerting time of the CWT has nothing to do with the flow rate under the same oxygen concentration, and the flow rate of the NEA determines the inerting ratio of each bay. Based on comparative analysis of the numerical result, it proves that the shrink analogy method can be used to simulate the inerting process of the CWT. The research provides reference for optimizing the design of a transport airplane inerting system.

     

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