Volume 29 Issue 1
Jan.  2014
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Article Navigation >  Journal of Aerospace Power  > 2014  >  29(1): 31-41
HUANG Ming-ming, SHAO Wei-wei, ZHANG Zhe-dian, XIONG Yan, LIU Yan, LEI Fu-lin, XIAO Yun-han. Comparison of CH4 moderate or intense low-oxygen dilution combustion characteristics based on cross-flow jet mixing and swirl mixing[J]. Journal of Aerospace Power, 2014, 29(1): 31-41. doi: 10.13224/j.cnki.jasp.2014.01.005
Citation: HUANG Ming-ming, SHAO Wei-wei, ZHANG Zhe-dian, XIONG Yan, LIU Yan, LEI Fu-lin, XIAO Yun-han. Comparison of CH4 moderate or intense low-oxygen dilution combustion characteristics based on cross-flow jet mixing and swirl mixing[J]. Journal of Aerospace Power, 2014, 29(1): 31-41. doi: 10.13224/j.cnki.jasp.2014.01.005
shu

Comparison of CH4 moderate or intense low-oxygen dilution combustion characteristics based on cross-flow jet mixing and swirl mixing

doi: 10.13224/j.cnki.jasp.2014.01.005
  • 1.

    Key Laboratory of Advanced Energy and Power, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China

  • 2.

    Research Center for Clean Energy and Power, Chinese Academy of Sciences, Lianyungang Jiangsu 222069, China

  • 3.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • Received Date: 2012-11-27
  • Publish Date: 2014-01-28
    Abstract
  • Two axially-staged moderate or intense low-oxygen dilution(MILD) configurations, based on cross-flow jet mixing and swirl mixing, were numerically and experimentally studied to compare their mixing performance from flow field pattern and species distribution, and to compare their combustion property from flame behavior and NO and CO emissions. The experiment fuel was methane and the heat load was regulated in the range of 16.2 to 25.9kW. The mixing between fuel and air stream is delayed in the cross-flow jet mixing configuration compared to the swirl mixing configuration, and thereby the recirculated hot flue gas preheats and diluts the fuel and air stream before spontaneous reaction in the former configuration. Compared to the swirl mixing configuration, higher flame lift-off height and more spatially distributed flame are observed in the cross-flow jet mixing configuration, of which flame behavior is also closer to MILD combustion. Furthermore, lower NO and CO emissions are observed for the cross-flow jet mixing staged combustor; at gas recirculation ratio of 0.5 and equivalence ratio of 0.6, the volume fractions of NO and CO in the flue gas are both 4×10-6.

     

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