Volume 35 Issue 12
Dec.  2020
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YE Jiawei, ZHANG Shunping, YU Xin. Flame structure in supersonic combustion chamber based on 500 Hz OH-PLIF technology,[J]. Journal of Aerospace Power, 2020, 35(12): 2593-2601. doi: 10.13224/j.cnki.jasp.2020.12.013
Citation: YE Jiawei, ZHANG Shunping, YU Xin. Flame structure in supersonic combustion chamber based on 500 Hz OH-PLIF technology,[J]. Journal of Aerospace Power, 2020, 35(12): 2593-2601. doi: 10.13224/j.cnki.jasp.2020.12.013

Flame structure in supersonic combustion chamber based on 500 Hz OH-PLIF technology,

doi: 10.13224/j.cnki.jasp.2020.12.013
  • Received Date: 2020-04-25
  • Publish Date: 2020-12-28
  • 500 Hz high-speed OH-PLIF technology was used for the research of the flame structure in supersonic combustion chamber, which was characterized by short time-lag and high turbulence in cavity chamber. Combining the pressure of the wall surface, the ignition, stabilization and extinguishing of the flame were studied. The results showed that ignition occurred when the hydrogen equivalents were 0.1 and 0.3. PLIF camera got the image in 2 ms under the spark. A detonation combustion existed in the cavity of the equivalent ratio of 0.1, and the flame was slower to reach stable state in the cavity (about 65 ms). In the process of stabilization of the flame, the equivalent 0.3 was in an incomplete combustion state, the burning area was closer to the wall, the burning position and nuclear position of the fire were greatly changed at the equivalent 0.3. At the equivalent of 0.1, the flame was transmitted from the middle of the cavity to the front edge of the cavity with a process of a briefly increased flame. Flame extinguished at the front edge of the cavity. However the equivalent 0.3 was slightly weaker, which was eventually extinguished between the front edge of the cavity and the position of hydrogen injection.

     

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