Volume 35 Issue 2
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LIU Yingjie, LIU Xiao, ZHOU Bo. Large eddy simulation of low swirl premixed flame stabilization mechanism[J]. Journal of Aerospace Power, 2020, 35(2): 298-304. doi: 10.13224/j.cnki.jasp.2020.02.009
Citation: LIU Yingjie, LIU Xiao, ZHOU Bo. Large eddy simulation of low swirl premixed flame stabilization mechanism[J]. Journal of Aerospace Power, 2020, 35(2): 298-304. doi: 10.13224/j.cnki.jasp.2020.02.009
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Large eddy simulation of low swirl premixed flame stabilization mechanism

doi: 10.13224/j.cnki.jasp.2020.02.009
  • 1.

    Aero Engine Academy of China,Aero Engine Corporation of China,Beijing 101304,China

  • 2.

    College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China

  • 3.

    Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen Guangdong 518055,China

  • Received Date: 2019-07-29
  • Publish Date: 2020-02-28
    Abstract
  • The large-eddy simulation (LES) method was used to compare the premixed combustion characteristics of high and low swirls, and the flame stability mechanism of low swirl was analyzed. Results showed that LES coupling with PaSR combustion model can accurately capture the small structures and flow field distribution of premixed flame. The low swirl flow had a weak recirculation zone (sometimes just a low velocity zone), while a high swirl flow produced a strong recirculation zone with a low frequency vibration of the precession vortex core (PVC). By analyzing the change of vortex and flame temperature field, it was found that vortices generated from swirl and center jet flow were the main factors of stability mechanism to stabilize flame in the low velocity region, forming alternating W and V flame.

     

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