Volume 34 Issue 3
Jun.  2020
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WU Ge, LI Yun, WAN Minggang, ZHU Jiajian, YANG Yixin, SUN Mingbo. Visualization of flame structure in supersonic combustion by Planar Laser Induced Fluorescence technique[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(3): 70-77. DOI: 10.11729/syltlx20190168
Citation: WU Ge, LI Yun, WAN Minggang, ZHU Jiajian, YANG Yixin, SUN Mingbo. Visualization of flame structure in supersonic combustion by Planar Laser Induced Fluorescence technique[J]. Journal of Experiments in Fluid Mechanics, 2020, 34(3): 70-77. DOI: 10.11729/syltlx20190168
shu

Visualization of flame structure in supersonic combustion by Planar Laser Induced Fluorescence technique

  • Science and Technology on Scramjet Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

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  • Received Date: January 05, 2020
  • Revised Date: May 24, 2020
    Graphical Abstract
    • Abstract
  • Planar Laser Induced Fluorescence (PLIF) can be used to visualize the flame structure with high temporal and spatial resolution and investigate the mechanism of supersonic combustion. In this paper, OH-PLIF and CH-PLIF techniques were used to study the flame structure in supersonic combustion. The cavity-stabilized reaction zone structure of the three streamwise sections and two spanwise sections in a supersonic combustor was obtained by using the OH-PLIF technique. The experimental results show that the combustion occurs in the inner cavity and the OH radicals are distributed symmetrically along the central axis at a low global equivalence ratio. The OH radicals are primarily distributed at two-side-wall of the combustor and the location of the flame is higher than that of the cavity at a high equivalence ratio. The heat-release structure of the cavity-stabilized flame was observed by the CH-PLIF technique. It is found that the heat-release zone is highly wrinkled and distorted in the supersonic combustion and it is distributed in a narrower region than the reaction zone.
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    • References (18)
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