Volume 36 Issue 9
Sep.  2021
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QIN Wenjin, XU Lihui, LU Dengbiao, LIU Hao. Analysis of n-dodecane spray jet by proper orthogonal decomposition[J]. Journal of Aerospace Power, 2021, 36(9): 1917-1923. doi: 10.13224/j.cnki.jasp.20200500
Citation: QIN Wenjin, XU Lihui, LU Dengbiao, LIU Hao. Analysis of n-dodecane spray jet by proper orthogonal decomposition[J]. Journal of Aerospace Power, 2021, 36(9): 1917-1923. doi: 10.13224/j.cnki.jasp.20200500
shu

Analysis of n-dodecane spray jet by proper orthogonal decomposition

doi: 10.13224/j.cnki.jasp.20200500
  • 1.

    School of Mechanical Engineering， University of Shanghai for Science and Technology，Shanghai 200093，China

  • 2.

    Beijing Aerospace Institute for Metrology and Measurement Technology， China Academy of Launch Vehicle Technology， China Aerospace Science and Technology Corporation，Beijing 100076，China

  • Received Date: 2020-11-22
  • Publish Date: 2021-09-28
    Abstract
  • Large eddy simulation was used to calculate the cold spray phenomenon of single component alternative fuel n-dodecane for aviation kerosene，and to explore the coupling phenomenon of multiple physical fields in spray jets.The process of fuel breaking，evaporation and oil-gas mixing was analyzed from the macro level，and it was found that the flow field vortices played an important role in the process.The data base of mass fraction field and vorticity field of n-dodecane jet flow was processed by the proper orthogonal decomposition，and the relationship between them was explored from the micro level.The results showed that there was a significant spatial distribution correlation between the n-dodecane mass fraction field spray structure and the jet flow vorticity field vortex structure，reflecting that the evolution of two structures had important correlation characteristics.The turbulence fluctuation resulted in the change of the vortex scale，which affected the breakup and evaporation of the fuel，and finally changed the distribution morphologies of different scale structures of spray.

     

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