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Volume 30 Issue 2
Jun 2016
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Chinese Journal of High Pressure Physics  > 2016  >  30(2): 149-156.
MENG Xiang-Wen, WU Xiao-Min, MIAO Zhan-Li, HE Yan, JIAO Yu. Effects of Positive High-Voltage on Flame Propagation and Combustion Characteristics of Lean Premixed CH4/O2/N2 Flames[J]. Chinese Journal of High Pressure Physics, 2016, 30(2): 149-156. doi: 10.11858/gywlxb.2016.02.010
Citation: MENG Xiang-Wen, WU Xiao-Min, MIAO Zhan-Li, HE Yan, JIAO Yu. Effects of Positive High-Voltage on Flame Propagation and Combustion Characteristics of Lean Premixed CH4/O2/N2 Flames[J]. Chinese Journal of High Pressure Physics, 2016, 30(2): 149-156. doi: 10.11858/gywlxb.2016.02.010
shu

Effects of Positive High-Voltage on Flame Propagation and Combustion Characteristics of Lean Premixed CH4/O2/N2 Flames

doi: 10.11858/gywlxb.2016.02.010
  • 1.

    College of Electromechanical Engineering, Qingdao University ofScience and Technology, Qingdao 266061, China

  • 2.

    Institute of Internal Combustion Engine, Xi'an JiaotongUniversity, Xi'an 710049, China

  • Received Date: 10 Dec 2014
  • Rev Recd Date: 09 Feb 2015
    Abstract
  • In this work we carried out an experiment to investigate the effects of positive high-voltage electric fields on the flame propagation and combustion characteristics of lean premixed CH4/O2/N2 flames in a constant-volume combustion chamber when the excess air ratio is respectively 1.6 and 1.8.The results from our experiment show that the flame propagation is significantly improved in the field direction with the application of positive DC electric fields, and this phenomenon is increasingly more obvious with the increase of the electric field.When the voltage input reaches 12 kV, the mean flame propagation velocities for λ=1.6 and 1.8 are 1.38 and 1.07 m/s, respectively, which is an increase by 133.41% and 369.97% compared to the case without an electric field.Moreover, at U=12 kV, the peak pressures for λ=1.6 and 1.8 are increased by 13.07% and 100.81%, and the corresponding time it takes for the peak pressure to occur is advanced by 35.94% and 18.09% respectively.It is therefore concluded that the combustion of lean premixed CH4/O2/N2 can be significantly improved by the positive high-voltage electric fields applied.

     

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